引用第1楼yuqijun于2011-02-15 14:58发表的 :+ }8 p: K9 r- n; W* ]( e, h
IP54是防水等级呀,
hdf590 发表于 2011-3-19 21:48
Table 2 – Examples of the provision of pollution degree environments
Reduction of Pollution Degree ...
ok_hmh 发表于 2011-2-16 17:57# i4 c6 q. Z$ E- a& O
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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