操作器还是操作工? The 1/2 inch connection and valve should not interfere with the operation of the manual operator. Socket welding is to be in accordance with ANSI B16.36. The outlet of the V2 inch valve should be capped. 1/2 寸连接和阀门不能妨碍手动操作器的操作?还是操作工手动操作 查看更多11个回答 . 1人已关注