单项选择题
A.0.1% B.0.05% C.0.5% D.1%
A.爆炸或火灾 B.电击 C.妨碍生产 D.静电除尘
A.0.7 B.1 C.2 D.5
A.机械联锁 B.电磁联锁 C.编程联锁 D.钥匙联锁
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