The contact among grains can be classified as perfect contact and sliding contact.
将砂土颗粒的接触方式分为完善联结和滑动联结。
Safe electrical sliding contact line is a kind of lifting.
安全滑触线是起重电气的一种。
Steel body sliding contact line is a kind of lifting accessories.
钢体滑触线是起重配件的一种。
Steel body sliding contact line is a kind of lifting accessories.
钢体滑触线是起重配件的一种。
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