lap machine是什么意思

用法例句

It is simple, practical and easy for realization, and can be used to reform the old lap machines and to replace the old cone-piano motion.

提出了用交流电机变频调速技术实现成卷机自调匀整的一种方案。

Alternating transducer used on the device of adjust-balance in the machine of loosing cotton;

交流变频器在清花成卷机天平调节装置上的应用