subtractive pilot是什么意思

用法例句

This paper introduced the unloading valves for blocking in paver, application of screeding unitfloating functions, blocking functions and relief functions in road construction, the unloading capacity calculation methods.

介绍了摊铺机闭锁卸载阀,熨平装置浮动、闭锁、卸载功能在道路施工中的使用,以及卸载能力的计算方法。