BillWei 发表于 2016-10-17 09:50 $ V; ~: F! {4 A% L/ s. G$ V
但标准中说的是External parts of insulating material providing protection against electric shock?
信思哲 发表于 2016-10-21 15:11 4 M# }# r) A6 p1 v2 W) d8 f; x. r
这个也不是,搞什么飞机,DSH-500是what distance consisting of material plus one or more air layers
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