[化] 座板;
Connections for vertical lubricating oil drain from dry sump in bed plate.
主润滑油路和十字头润滑的连接.
As the process developed; metal plates were used instead of stones, cylinder was used to mount the plate instead of a flat bed for the stone, the term remained as it was.
尽管各样改进:金属版式代替石版,版圆筒代替平台的版床,这个名称保持不变。
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