... reduce progeny numbers ==> 压缩后代 reduce roll machine ==> 锻轧机 reduce sign ==> 慢行标志 ...
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It is not only able to reduce rollers in roll forming but also to lower the requirements for centre distance variation between two rollers of forming machine.
该方法可使滚压成形貌轮的对数减少，而且对成形机两辊轮的中心距离变化量要求也不高。
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