引用第0楼kingfan于2009-07-20 13:54发表的 哪位能正确理解草坪机标准B71.1中的一段话? :
美国标准b71.1的10.7.2节中有这样一段话:; R$ m" G6 `# A1 ]( s
10.7.2. Operating positions 操作位置4 h# w, P* [$ @3 r! {% r5 F
A positive upstop shall be provided that does not allow the rearward part of the handle to come closer than 700 mm (30 in) horizontally behind the closest path of the mower blades during normal operation.
请注意: 700 mm (30 in) ,有谁能解释是700mm正确还是30in正确。B71.1中通篇是这样表述的:750mm(30in)
注:请不要用25.4系数来解释,因为700mm=27.56 inchs, 750mm=29.53 inchs
引用第5楼大侠风清扬于2009-07-21 11:33发表的 :
所有的美标规定,括号外的是要求值,括号内的是参考值,这个没有疑问了,我在某本美标上看到过, 如果需要我可以查一下这个
引用第9楼大侠风清扬于2009-07-21 14:47发表的 :& N: h: J* b1 O/ F9 v3 J% @
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i think my opinion is absolutely correct.$ P+ A, {# g2 s- N5 c3 X
see following clause, it is common in UL standard. i just pick it from UL 1004.
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引用第14楼不安全因素于2009-08-06 10:53发表的 :
标准上30in是对的
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