单项选择题
A.压缩氧气 B.压缩空气 C.电动 D.电动加压缩氧气 E.电动加压缩空气
A.一次抽搐 B.两次抽搐 C.三次抽搐 D.四次抽搐 E.无抽搐
A.APL是auto pressure lock的简写 B.APL是adjustabLe pressure limiting的简写 C.APL是air pressure lock的简写 D.APL是air pressure lift的简写 E.APL是auto pressure lift的简写