A.5% B.10% C.15% D.20%
A.1/3 B.1/2 C.2/3 D.3/4
A.轉(zhuǎn)速通常為40~60r/min B.轉(zhuǎn)刷全部浸液 C.轉(zhuǎn)刷部分浸液 D.轉(zhuǎn)刷及電動機定期維護