还有一些开关是在松动盖板紧固螺栓后(即失爆后)才断电，这些都是重大隐患。

Some switches would be shut off only when the fastened bolt of the cover released (the flameproof function lost). Those all would be the important dangers.

youdao

由于过去没有保障这一条款的技术装备，矿用开关无“两防”功能一直未被作为失爆对待。

Because lacking technical equipments to guarantee this provision in the past, it has not been treating as"no explosion-proof"that mine switches don't have"biguard".

youdao

由于过去没有保障这一条款的技术装备，矿用开关无“两防”功能一直未被作为失爆对待。

Because lacking technical equipments to guarantee this provision in the past, it has not been treating as"no explosion-proof"that mine switches don't have"biguard".

youdao