hand cylinder method
人工吹筒摊平法
They can be cylinder shaped container, or a manual hand pump.
它们可能是柱状的容器，或者手动泵。
The hand piece of the suspended type submerged arc welding machine and an accessory enter the cylinder body through pipe orifices.
悬挂式埋弧焊接机头和附件通过管孔进入筒体。
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