洁净钢平台建设
construction of clean steel platform
Ⅰ级洁净手术室
1st grade clean operating room
层两超洁净区
laminar flow ultra clean area
垂直单向流洁净室
vertical unidirectional air flow cleaning room
vertical unidirectional-flow cleanroom
当代洁净煤技术进展
Present Situation of Clean Coal Technology
电子洁净厂房照明
clean room factory lighting
负压洁净手术室
negative pressure clean operating rooms
钢水洁净度
liquid steel cleanliness
Cleanliness of Molten Steel
purity of molten steel
steel cleanness
liguid steel cleanliness