发布时间:2025-01-30 11:07:39
同样开门宽度中分门开门速度会快一些,同样宽度,理论上旁开门滑动部件磨损会快一点。如果是货梯,经常拖车货物进出旁开门因为单边开,被撞的几率会小一些。
地暖回水管上的平衡阀怎样调节地暖不热是不是流速慢呐请教高人解答
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