BS EN 381-4-1999 Protective clothing for users of hand-held chain saws Test methods for chainsaw protective gloves《手持式链锯使用者用防护服 链锯防护手套的试验方法》.pdf

《BS EN 381-4-1999 Protective clothing for users of hand-held chain saws Test methods for chainsaw protective gloves《手持式链锯使用者用防护服 链锯防护手套的试验方法》.pdf》由会员分享，可在线阅读，更多相关《BS EN 381-4-1999 Protective clothing for users of hand-held chain saws Test methods for chainsaw protective gloves《手持式链锯使用者用防护服 链锯防护手套的试验方法》.pdf（18页珍藏版）》请在麦多课文档分享上搜索。

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 381-4:1999 The Euro

2、pean Standard EN 381-4:1999 has the status of a British Standard ICS 13.340.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Protective clothing for users of hand-held chainsaws Part 4: Test methods for chainsaw protective glovesThis British Standard, having been prepared un

3、der the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 November 1999 BSI 11-1999 ISBN 0 580 32730 2 BS EN 381-4:1999 Amendments issued since publication Amd. No. Date Comments National foreword This B

4、ritish Standard is the English language version of EN 381-4:1999. The UK participation in its preparation was entrusted by Technical Committee PH/3, Protective clothing, to Subcommittee PH/3/5, Clothing for protection against chainsaws, which has the responsibility to: aid enquirers to understand th

5、e text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can

6、be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “

7、Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from le

8、gal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.(8523($167$1$5 (1 1250(8523e(11( (8

9、523b,6&+(1250 -XO ,&6 (QJOLVKYHUVLRQ 3URWHFWLYHFORWKLQJIRUXVHUVRIKDQGKHOGFKDLQVDZV3DUW 7HVWPHWKRGVIRUFKDLQVDZSURWHFWLYHJORYHV 9rWHPHQWVGHSURWHFWLRQSRXUOHVXWLOLVDWHXUVGHVFLHVjFKDvQH WHQXHVjODPDLQ3DUWLH0pWKRGHVGHVVDLSRXUOHVJDQWVGH SURWHFWLRQFRQWUHOHVVFLHVjFKDvQH 6FKXWNOHLGXQJIU%HQXWHUYRQKDQGJHIKUWHQ.H

10、WWHQVlJHQ7HLO 3UIYHUIDKUHQIU6FKXWKDQGVFKXKHIU.HWWHQVlJHQ 7KLV(XURSHDQ6WDQGDUGZDVDSSURYHGE&(1RQ0D &(1PHPEHUVDUHERXQGWRFRPSOZLWKWKH&(1&(1(/(&,QWHUQDO5HJXODWLRQVZKLFKVWLSXODWHWKHFRQGLWLRQVIRUJLYLQJWKLV(XURSH DQ 6WDQGDUGWKHVWDWXVRIDQDWLRQDOVWDQGDUGZLWKRXWDQDOWHUDWLRQ8SWRGDWHOLVWVDQGELEOLRJUDSKLFDOUHIHUH

11、QFHVFRQFHUQLQJV XFKQDWLRQDO VWDQGDUGVPDEHREWDLQHGRQDSSOLFDWLRQWRWKH&HQWUDO6HFUHWDULDWRUWRDQ&(1PHPEHU 7KLV(XURSHDQ6WDQGDUGHLVWVLQWKUHHRIILFLDOYHUVLRQV(QJOLVK)UHQFK*HUPDQ$YHUVLRQLQDQRWKHUODQJXDJHPDGHEWUD QVODWLRQXQGHU WKHUHVSRQVLELOLWRID&(1PHPEHULQWRLWVRZQODQJXDJHDQGQRWLILHGWRWKH&HQWUDO6HFUHWDULDWKDVW

12、KHVDPHVWDWXVDVWKHRII LFLDOYHUVLRQV &(1PHPEHUVDUHWKHQDWLRQDOVWDQGDUGVERGLHVRI$XVWULD%HOJLXP&HFK5HSXEOLFHQPDUN)LQODQG)UDQFH*HUPDQ*UHHFH, FHODQG ,UHODQG,WDO/XHPERXUJ1HWKHUODQGV1RUZD3RUWXJDO6SDLQ6ZHGHQ6ZLWHUODQGDQG8QLWHG.LQJGRP (8523($1&200,77()2567$1$5,=$7,21 &20,7e(8523e(1(1250$/,6$7,21 (8523b,6&+(6.2

13、0,7()h5125081* &HQWUDO6HFUHWDULDWUXHGH6WDVVDUW%UXVVHOV &(1 $OOULJKWVRIHSORLWDWLRQLQDQIRUPDQGEDQPHDQVUHVHUYHG ZRUOGZLGHIRU&(1QDWLRQDO0HPEHUV 5HI1R(1(3DJH (1 %6, &RQWHQWV 3DJH )RUHZRUG ,QWURGXFWLRQ 6 F R S H 1RUPDWLYHUHIHUHQFHV HILQLWLRQ /LQHRIORQJHVWOHQJWKRIDJORYH 7HVWVSHFLPHQV 3UHWUHDWPHQW &KHFNLQJR

14、ISURWHFWLYHFRYHUDJH $SSDUDWXV 7HVWULJ &KDLQVDZSURWHFWLYHJORYHPRXQWLQJGHYLFH 7HVWSURFHGXUH *HQHUDO 0RXQWLQJRIJORYHRQDUWLILFLDOKDQG &XWWLQJ (UJRQRPLFSURSHUWLHV *HQHUDO $SSDUDWXV 3URFHGXUH 7HVWUHSRUW $QQH=$LQIRUPDWLYH&ODXVHVRIWKLV(XURSHDQ6WDQGDUGDGGUHVVLQJHVVHQWLDO UHTXLUHPHQWVRURWKHUSURYLVLRQVRI(8LUHF

15、WLYHV )RUHZRUG 7KLV(XURSHDQ6WDQGDUGKDVEHHQSUHSDUHGE7HFKQLFDO&RPPLWWHH&(17&3URWHFWLYHFORWKLQJLQFOXGLQJKDQG DQGDUPSURWHFWLRQDQGOLIHMDFNHWVWKHVHFUHWDULDWRIZKLFKLVKHOGE,1 7KH(XURSHDQ6WDQGDUGVIRU3URWHFWLYHFORWKLQJIRUXVHUVRIKDQGKHOGFKDLQVDZVDUHWKHIROORZLQJ (1 3URWHFWLYHFORWKLQJIRUXVHUVRIKDQGKHOGFKDLQVDZV3

16、DUW7HVWULJIRUWHVWLQJUHVLVWDQFHWR FXWWLQJEDFKDLQVDZ (1 3DUW7HVWPHWKRGVIRUOHJSURWHFWRUV (1 3DUW7HVWPHWKRGVIRUIRRWZHDU (1 3DUW7HVWPHWKRGIRUFKDLQVDZSURWHFWLYHJORYHV (1 3DUW5HTXLUHPHQWVIRUOHJSURWHFWRUV (1 3DUW5HTXLUHPHQWVIRUFKDLQVDZSURWHFWLYHJORYHV (1 3DUW7HVWPHWKRGVIRUFKDLQVDZSURWHFWLYHJDLWHUV (1 3DUW5H

17、TXLUHPHQWVIRUFKDLQVDZSURWHFWLYHJDLWHUV 7KLV(XURSHDQ6WDQGDUGVKDOOEHJLYHQWKHVWDWXVRIDQDWLRQDOVWDQGDUGHLWKHUESXEOLFDWLRQRIDQLGHQWLFDOWHWRUE HQGRUVHPHQWDWWKHODWHVWE-DQXDUDQGFRQIOLFWLQJQDWLRQDOVWDQGDUGVVKDOOEHZLWKGUDZQDWWKHODWHVWE -DQXDU 7KLV(XURSHDQ6WDQGDUGKDVEHHQSUHSDUHGXQGHUDPDQGDWHJLYHQWR&(1EWKH(XURS

18、HDQ&RPPLVVLRQDQGWKH (XURSHDQ)UHH7UDGH$VVRFLDWLRQDQGVXSSRUWVHVVHQWLDOUHTXLUHPHQWVRI(8LUHFWLYH(& )RUUHODWLRQVKLSZLWK(8LUHFWLYHVVHHLQIRUPDWLYH$QQH=$ZKLFKLVDQLQWHJUDOSDUWRIWKLVVWDQGDUG $FFRUGLQJWRWKH&(1&(1(/(&,QWHUQDO5HJXODWLRQVWKHQDWLRQDOVWDQGDUGVRUJDQLDWLRQVRIWKHIROORZLQJFRXQWULHV DUHERXQGWRLPSOHPHQWW

19、KLV(XURSHDQ6WDQGDUG$XVWULD%HOJLXP&HFK5HSXEOLFHQPDUN)LQODQG)UDQFH *HUPDQ*UHHFH,FHODQG,UHODQG,WDO/XHPERXUJ1HWKHUODQGV1RUZD3RUWXJDO6SDLQ6ZHGHQ6ZLWHUODQG DQGWKH8QLWHG.LQJGRP3DJH (1 %6, ,QWURGXFWLRQ 7KLV(XURSHDQ6WDQGDUGIRUPVSDUWRIDVHULHVFRQFHUQHGZLWKSHUVRQDOSURWHFWLYHHTXLSPHQWGHVLJQHGWRSURWHFW DJDLQVWWKH

20、ULVNVDULVLQJIURPWKHXVHRIKDQGKHOGFKDLQVDZV$VIDUDVLVNQRZQDOOFKDLQVDZVDUHGHVLJQHGIRUULJKW KDQGHGXVHDQGWKHUHIRUHDOOSURWHFWLYHFORWKLQJGHVLJQVDQGUHTXLUHPHQWVKDYHDVVXPHGULJKWKDQGHGXVH 3URWHFWLRQFDQQRWEHDGHTXDWHIRUOHIWKDQGHGXVH 1RSURWHFWLYHHTXLSPHQWFDQHQVXUHDSURWHFWLRQDJDLQVWFXWWLQJIURPDKDQGKHOGFKDLQVDZ 1HY

21、HUWKHOHVVHSHULHQFHKDVVKRZQWKDWLWLVSRVVLEOHWRGHVLJQSURWHFWLYHHTXLSPHQWZKLFKRIIHUVDFHUWDLQGHJUHHRI SURWHFWLRQ LIIHUHQWIXQFWLRQDOSULQFLSOHVFDQEHDSSOLHGLQRUGHUWRJLYHSURWHFWLRQ 7KHVHLQFOXGH FKDLQVOLSSLQJRQFRQWDFWWKHFKDLQGRHVQRWFXWWKHPDWHULDO FORJJLQJILEUHVDUHGUDZQZLWKWKHFKDLQLQWRWKHGULYHVSURFNHWDQGEORFNF

22、KDLQ PRYHPHQW FKDLQEUDNLQJILEUHVKDYHDKLJKUHVLVWDQFHWRFXWWLQJDQGDEVRUEURWDWLRQDOHQHUJWKHUHE UHGXFLQJWKHFKDLQVSHHG 2IWHQPRUHWKDQRQHSULQFLSOHLVDSSOLHG 6FRSH 7KLV(XURSHDQ6WDQGDUGVSHFLILHVWKHWHVWVSHFLPHQVSUHWUHDWPHQWDQGWHVWLQJRIJORYHVWKDWDUHLQWHQGHGWRSURYLGH SURWHFWLRQDJDLQVWFXWVEFKDLQVDZV7KHPHWKRGIRUPHD

23、VXUHPHQWRISURWHFWLYHFRYHUDJHWKHDSSDUDWXVDQGWKH WHVWPHWKRGIRUDVVHVVLQJUHVLVWDQFHWRFXWWLQJDQGWKHSUDFWLFDOSHUIRUPDQFHWHVWIRUPHDVXULQJWKHJULSIDFWRU GHVFULEHGLQ(1DUHVSHFLILHG 1RUPDWLYHUHIHUHQFHV 7KLV(XURSHDQ6WDQGDUGLQFRUSRUDWHVEGDWHGRUXQGDWHGUHIHUHQFHSURYLVLRQVIURPRWKHUSXEOLFDWLRQV7KHVH QRUPDWLYHUHIHUHQF

24、HVDUHFLWHGDWWKHDSSURSULDWHSODFHVLQWKHWHWDQGWKHSXEOLFDWLRQVDUHOLVWHGKHUHDIWHU)RUGDWHG UHIHUHQFHVVXEVHTXHQWDPHQGPHQWVWRRUUHYLVLRQVRIDQRIWKHVHSXEOLFDWLRQVDSSOWRWKLV(XURSHDQ6WDQGDUGRQO ZKHQLQFRUSRUDWHGLQLWEDPHQGPHQWVRUUHYLVLRQ)RUXQGDWHGUHIHUHQFHVWKHODWHVWHGLWLRQRIWKHSXEOLFDWLRQ UHIHUUHGWRDSSOLHV (1 3URW

25、HFWLYHFORWKLQJIRUXVHUVRIKDQGKHOGFKDLQVDZV3DUW7HVWULJIRUWHVWLQJ UHVLVWDQFHWRFXWWLQJEDFKDLQVDZ (1 3URWHFWLYHFORWKLQJIRUXVHUVRIKDQGKHOGFKDLQVDZV3DUW5HTXLUHPHQWVIRU FKDLQVDZSURWHFWLYHJORYHV (1 *HQHUDOUHTXLUHPHQWVIRUJORYHV (1,62 7HWLOHV(YDOXDWLRQRIVWDELOLWWRPDFKLQHGUFOHDQLQJ,62 ,62 7HWLOHVRPHVWLFZDVKLQJD

26、QGGULQJSURFHGXUHVIRUWHWLOHWHVWLQJ HILQLWLRQV )RUWKHSXUSRVHVRIWKLV(XURSHDQ6WDQGDUGWKHIROORZLQJGHILQLWLRQVKDOODSSO OLQHRIORQJHVWOHQJWKRIDJORYH WKHSHUSHQGLFXODUOLQHMRLQLQJWKHVHDPRIWKHFXIIRUHTXLYDOHQWSRVLWLRQLIQRVHDPLVSUHVHQWZLWKWKHWLSRIWKH VHFRQGILQJHURUHTXLYDOHQWSRVLWLRQLQDPLWWRURQHILQJHUPLWW3DJH (1 %

27、6, 7HVWVSHFLPHQV $OOVSHFLPHQVVKDOOEHRIVLHDVGHILQHGLQ(1ZKHQWKLVVLHLVDYDLODEOH,IDGLIIHUHQWVLHKDVWREH XVHGLWVKDOOEHDVFORVHWRVLHDVSRVVLEOHDQGWKHQXPEHURIVSHFLPHQVUHTXLUHGVKDOOEHDVIROORZVDFFRUGLQJWR UHODWHGPDQGDWRUDQGRSWLRQDOUHTXLUHPHQWVRI(1 DPDQGDWRUWHVWV )RXUOHIWKDQGJORYHVIRUHDFKSUHWUHDWPHQWDSSOLHG ERSW

28、LRQDOWHVW 7ZROHIWKDQGJORYHVIRUHDFKSUHWUHDWPHQWDSSOLHG 7ZRULJKWKDQGJORYHVIRUHDFKSUHWUHDWPHQWDSSOLHG 3UHWUHDWPHQW (FHSWLQWKHVSHFLILFFDVHVGHWDLOHGEHORZDOOWKHWHVWVSHFLPHQVVKDOOEHZDVKHGDQGGULHGILYHWLPHVEHIRUHWHVWLQJ 7KLVZDVKLQJVKDOOEHDFFRUGLQJWRSURFHGXUH$RI,62DQGWKHGULQJEWXPEOHGULQJDWDWHPSHUDWXUH QRWHFHH

29、GLQJ &SURFHGXUH( (FHSWLRQVWRWKLVWUHDWPHQWDUHSHUPLWWHGLQWKHIROORZLQJFDVHV D :KHUHWKHKDQGSURWHFWRUVDUHPDUNHGDVXQVXLWDEOHIRUZDVKLQJRUGUFOHDQLQJWKHRXWVLGHRIWKHKDQG SURWHFWRUVVKDOOEHFRPSOHWHOLPPHUVHGLQZDWHU &IRUPLQDQGWKHQDOORZHGWROLQHGUZLWKWKH RSHQLQJGRZQZDUGVIRUDWOHDVWKDW &DQGUHODWLYHKXPLGLW E :KHUHWKHK

30、DQGSURWHFWRUVDUHPDUNHGDVXQVXLWDEOHIRUZDVKLQJEXWVXLWDEOHIRUGUFOHDQLQJ ,QVXFKFDVHVWKHWHVWVSHFLPHQVVKDOOEHGUFOHDQHGILYHWLPHVEHIRUHWHVWLQJ7KHGUFOHDQLQJVKDOOEH SHUIRUPHGSULQFLSDOOLQDFFRUGDQFHZLWKWKHFRQGLWLRQVGHVFULEHGLQRI(1,621RUHVWRUDWLYH ILQLVKLQJSURFHGXUHVKDOOEHXVHG F :KHUHWKHKDQGSURWHFWRUVDUHPDUNHGDV

31、VXLWDEOHIRUERWKZDVKLQJDQGGUFOHDQLQJ ,QVXFKFDVHVWKHWHVWVKDOOEHFDUULHGRXWRQERWKZDVKHGVSHFLPHQVDQGGUFOHDQHGVSHFLPHQVWZRVHWV RIVSHFLPHQVRUDWWKHUHTXHVWRIWKHPDQXIDFWXUHUILUVWGUFOHDQLQJDQGWKHQZDVKHGRQWKHVDPHVHWRI VSHFLPHQV G :KHUHWKHKDQGSURWHFWRUVDUHPDUNHGDVXQVXLWDEOHIRUWXPEOHGULQJ ,QVXFKFDVHVWKHVSHFLPHQVV

32、KDOOEHZDVKHGEWKHPHWKRGGHVFULEHGDERYHWKHQOLQHGULHGZLWKWKH RSHQLQJGRZQZDUGVIRUDWOHDVWKDW &DQGUHODWLYHKXPLGLWSURFHGXUH$RI ,62 &KHFNLQJRISURWHFWLYHFRYHUDJH 7KHFRYHUDJHLVPHDVXUHGRQRQHJORYHIURPHDFKSUHWUHDWPHQWXVHG )LWWKHJORYHRQWRDQDSSURSULDWHOVLHGKDQG0DUNDQGPHDVXUHWKHGLPHQVLRQVRIWKHSURWHFWLYHDUHDFRPSDUHWK

33、H UHVXOWVZLWKWKHUHTXLUHPHQWVLQFODXVHRI(1 D)RUGHVLJQ$VHHILJXUH WKHOHQJWKRIWKHSURWHFWLRQDUHDPHDVXUHGEHWZHHQWKHFXIIDQGWKHFURWFKEHWZHHQGLJLWDQG WKHZLGWKRIWKHSURWHFWLRQDUHDDWWKHPLGSRLQWRIWKHOLQHRIWKHORQJHVWOHQJWKDLVRIWKHJORYH E)RUGHVLJQ%VHHILJXUH WKHOHQJWKRIWKHSURWHFWLRQDUHDDVPHDVXUHGDORQJWKHOLQHRIWKHORQ

34、JHVWOHQJWKDLVRIWKHJORYH WKHZLGWKRIWKHSURWHFWLRQDUHDDWWKHPLGSRLQWRIWKHOLQHRIWKHORQJHVWOHQJWKDLVRIWKHJORYH 5HFRUGWKHPHDVXUHPHQWDQGFKHFNWKDWWKHUHTXLUHPHQWVJLYHQLQ(1DUHIXOILOOHG3DJH (1 %6, $SSDUDWXV 7HVWULJ 7KHWHVWULJLVDVGHVFULEHGLQ(1 127()RUWKHSXUSRVHVRIWHVWLQJJORYHVLWLVUHFRPPHQGHGWKDWWKHWHVWULJLVILWWH

35、GZLWKVRPHPHDQVRI OLPLWLQJWKHGHSWKRIFXWLQWRWKHDUWLILFLDOKDQGLQFDVHVZKHUHWKHJORYHIDLOVWRUHVLVWFXWWKURXJK &KDLQVDZSURWHFWLYHJORYHPRXQWLQJGHYLFH /HIWDQGULJKWDUWLILFLDOKDQGV 7KHVHDUHPRXOGHGIURPDULJLGSROPHUVXFKDVSROXUHWKDQH +DUGQHVV %HWZHHQ6KRUH$DQG6KRUH$ 7KHLUVKDSHVDQGGLPHQVLRQVDUHVKRZQLQILJXUHDQGWDEOH 1

36、27(7KHGHWDLOVJLYHQUHIHUWRDOHIWKDQG5LJKWKDQGVKDYHWKHVDPHVKDSHDQGGLPHQVLRQVEXWDUH PLUURULPDJHV3DJH (1 %6, 7DEOHLPHQVLRQVRIWKHDUWLILFLDOKDQG /HQJWK O PP O PP O PP O PP O PP O PP O PP O PP O PP O PP &LUFXPIHUHQFH D PP D PP D PP D PP D PP D PP D PP D PP D PP D PP D PP D PP %DVH $PHDQVRIPRXQWLQJWKHDUWLILF

37、LDOKDQGVRWKDWLWLVULJLGDQGGRHVQRWPRYHZKHQLPSDFWHGEWKHFKDLQVDZ 7HVWSURFHGXUH *HQHUDO 7KHFKDLQVDZXQLWLVDUUDQJHGDVLQ(1ZLWKWKHHFHSWLRQWKDWWKHKRULRQWDOGLVWDQFHIURPWKHFHQWUHRIWKH VSURFNHWWRWKHSRLQWRIFRQWDFWZLWKWKHWHVWVDPSOHVKDOOEHPPIURPWKHSLYRWVHHILJXUHLQ(1 7KHGRZQZDUGIRUFHDWWKHSRLQWRIFRQWDFWZLWKWKHWHVWVSH

38、FLPHQVKDOOEH1VHHLQ(1 2WKHUFDOLEUDWLRQPHWKRGVDUHSHUIRUPHGDVLQ(1 0RXQWLQJRIJORYHRQDUWLILFLDOKDQG 7KHJORYHVKDOOEHILWWHGRQWRWKHDSSURSULDWHLHHLWKHUOHIWRUULJKWDUWLILFLDOKDQGLQWKHVDPHPDQQHUDVLWZRXOGEH LQZHDU$QIDVWHQLQJGHYLFHVHJVWUDSVEXFNOHVHWFVKDOODOVREHIDVWHQHGDVLQZHDU7KHJORYHVKDOOEHILHGWR WKHDUWLILFLDOKD

39、QGEVWDSOHVLQWKHSDOPVRWKDWWKHJORYHGRHVQRWURWDWHGXULQJWHVWLQJ ,IDQILLQJVXVHGIRUWKLVSXUSRVHSDVVWKURXJKWKHSURWHFWLYHPDWHULDORIWKHJORYHWKLVIDFWVKDOOEHUHFRUGHGLQWKH WHVWUHSRUW 127(,QRUGHUWRDYRLGWKHSRVVLELOLWWKDWWKHILLQJVXVHGPLJKWWKHPVHOYHVLQWHUIHUHZLWKWKH HYDOXDWLRQRIWKHSHUIRUPDQFHRIWKHJORYHLWLVGHVLUDEOHW

40、KDWVWDSOHVRURWKHUILLQJGHYLFHVVKRXOG EHVRSRVLWLRQHGWKDWWKHGRQRWSDVVWKURXJKWKHSURWHFWLYHPDWHULDORIWKHJORYH 127(SHULHQFHLQGLFDWHVWKDWLWLVVXLWDEOHWRILWKHJORYHZLWKDOLQHRIVWDSOHVDWOHDVWRQH VWDSOHHYHUPPWKDWSDVVWKURXJKWKHXQSURWHFWHGSDUWRIWKHJORYHDVFORVHDVSRVVLEOHWRWKH HGJHRIWKHJORYHDVIXUWKHVWIURPWKHSLYRW3DJH (1