dah
n.大刀，长划
网络解释.磺化油；层站运行方向指示；或分别叫嗒；别惊慌
双语例句
1. 1 . According the properties of oil rotary screw compressor, formulated DAH oil rotary screw compressor oil.
根据喷油螺杆空气压缩机的性能特点,采用加氢基础油研制开发了DAH喷油螺杆压缩机油.
来自互联网
n.大刀，长划
网络解释.磺化油；层站运行方向指示；或分别叫嗒；别惊慌