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。
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。
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。
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