节性能较好的阀门是()。 ["截止阀;","节流阀;","闸阀;","蝶阀。"]
Photoshop工具箱中的裁切工具有什么功能?
翻矸前检查翻矸机房外()的正下方是否有人或拉矸车是否停在(),否则,严禁()。 ["清倒矸石","正下方","翻矸","正上方"]
当轴的设计直径为φ30,0.02,0.04时,该轴的实际直径应不大于()mm。 ["30;","29.96;","29.98;","29.94。"]
高位翻车机司机必须熟悉翻矸机的()以及操作翻矸机的(),会排除()。 ["供电线路","各项规定","一般性故障","原理"]
泥浆含砂量是指泥浆中不能过多少目筛网的砂子所占泥浆体积的百分数?