check valve
相关英语词汇推荐
- florist crepe paper
- buff (ing) paper
- pulp purification
- cheese roll
- setting mortar
- singing split
- dandy marks,dandy worm
- wood crib
- streww-strain tester
- linear sweep
- electronic probe sensor
- dynamite paper
- settling off
- abrasive
- protective paper
- ricing
- prosenchymatous cell
- down stroke,undershoot
- water absorption test
- button specks