单项选择题
A.提升管B.再生斜管C.汽提段D.旋风器料腿
A.0.4%~0.8%B.0.2%~0.4%C.0.1%~0.2%D.0.05%~0.1%
A.95.5%~97.5%B.96.5%~98.5%C.97.5%~99.5%D.98.5%~101.5%