引用第1楼yuqijun于2011-02-15 14:58发表的 :) [' z& h! C4 Z6 L( `+ H
IP54是防水等级呀,
hdf590 发表于 2011-3-19 21:48 & n A8 r" o" J! W( O
Table 2 – Examples of the provision of pollution degree environments * E2 f& p: }$ O; o/ n0 f; q" ]
Reduction of Pollution Degree ...
ok_hmh 发表于 2011-2-16 17:57* V4 _) A' |+ k6 e; \# q+ Z4 N% z
附加防护 从外部环境污染等级2到: 从外部环境污染等级3到: 降低污染等级的 ...
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