进入蒸发器的制冷剂由一个阀或量孔控制。
The entrance of refrigerant into the evaporator is controlled by a valve or an orifice.
滚镀时，要求滚筒装载量偏小，开孔率偏高，转速偏低。
In barrel plating, less barrel load, more barrel holes and lower barrel rotation were recommended.
滚镀时，要求滚筒装载量偏小，开孔率偏高，转速偏低。
In barrel plating, less barrel load, more barrel holes and lower barrel rotation were recommended.
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