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楼主 |
发表于 2007-5-21 17:33:05
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来自: 中国上海
谢谢cdxwg.最好有这种装置的图纸或者照片。还有,如果能够说服业主,这个是不需要的?
4 J0 p( E' I4 z* q以下是他们给的技术指导书中关于这个装置的描述:
% B1 y% g! ]$ b0 [. C9 J3.3.8 Hooks and hook blocks
k y" V. ~1 q2 Q8 H The hooks shall be made of forged steel and shall swivel on antifrication bearings arranged to exclude dirt and equipped for lubrication. Hook shall have a locking device which, when engaged,will lock the hook in the desired orientation.7 K3 \6 w) C- O2 Q. ]4 B# g3 Q1 o: F
Hook blocks shall be constructed from rolled steel and have close fitting guards.
4 t, i) d) F+ R+ F谢谢大家积极讨论了。 |
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