powderless
1. 96.Law is a powderless pit.
全国律法是无底的深渊。
2. J.W.Bradley, P.F.Borth, “Composition and process for powderless etching”, U.S.Patent 3161552,1964。
张启达、杨万发,冷却结晶系统回收处理硫酸/双氧水型微蚀液之技术与案例,环保资讯,42-48,1997。
3. powderless etching
无粉腐蚀
4. powderless etching machine
无粉腐蚀机
5. Some machines use powderless filters which are capable of removing soil particles greater than 30 micrometers.
某些机器使用powderless过滤器,其中有能力清除土壤颗粒大于30微米。
6. high-speed powderless etching machine
高速无粉腐蚀机