A.7.08mm B.11.2mm C.11.5mm D.15.8mm
A.白布擦凈 B.壓縮風(fēng)吹凈 C.油洗凈 D.先用白布擦凈,后用面團(tuán)粘凈
A.白布 B.棉紗布 C.粗布 D.絲棉