hard drawn pure commercial copper通俗点是啥

daiyujin · 发表于 2016-1-19 15:21

All busbars and connections shall be made from hard drawn pure commercial copper. Busbars and connections shall be provided with tin plated surface contracts.

aqwe · 发表于 2016-1-19 15:38

冷拉纯铜

[电气] hard drawn pure commercial copper通俗点是啥