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各位 UL 987 30.3 关于运动部件护罩要求:
4 E# _2 c1 V3 a30.3 Some guards provided over moving parts are required to be of the self-restoring type – for example,
% [% X* b# g' fa guard on a saw and a guard on a jointer. Other features of a guard that shall be considered include:5 a0 o3 V6 ?2 y: D
| a) Removability of the guard without the use of a tool; | b) Removability for servicing and the need for replacement;" e& u# ~ k5 E. s( t; _9 E
c) Strength and rigidity;( j' B9 z% U0 ~0 E2 l% N
d) Completeness; and
. e* P g' w1 e' \' h& ze) Creation of a risk of injury to persons, such as pinch points, material hang-ups or jams,' L2 r$ C5 ~; I
restricted vision, or other conditions adversely affecting the ease of operation; and the necessity7 \0 C5 h) h. \- o
for additional handling because of increased need for servicing – such as cleaning, unjamming,% {. D7 P1 @# l! T, B0 h
and the like.
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其中的a 怎么理解?不用工具就可以拆掉的运动部件护罩可以接受吗? |
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