cooled type valve
... 凸形气门头 convex head valve 冷却式真空管 cooled type valve 冷却风扇电空阀 cooling fan electro-pneumatic valve ...
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可在真空管式电阻炉体安装由多层铜管绕制的横磁线圈，需通水冷却。
May circle the system in the vacuum tubular resistance furnace body installment by the multi-layered copper pipe the horizontal field winding, must let water through cooling.
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