这是因为切断的机车不要再装配，就不必要严密的作业。

The part that was removed does not assemble once again . therefore , work that burns off it is advancing quickly.

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在上模节流棒槽内装入节流棒，将节流棒调节螺栓装配进节流棒的螺丝孔中，再装配上压块。

Mount restrictor bar into the restrictor bar groove of upper die, mount adjusting bolt for restrictor bar into the bolt hole in the restrictor bar, then mount lower press block, upper press block.

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如果固定环端面硬度低于HRC40，则应先在端面上重新堆焊一层硬质合金，经磨光后再装配。

If the set collar end hardness is lower than HRC40, should first on the end surface again a built-up welding hard alloy, after the polish repackaging.

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