Excessive clearance will influence perforating effect while over smallness may lead to engineering accident easily.
射孔枪与套管之间的间隙过大会影响射孔效果，太小容易出现工程事故。
Excessive clearance of mechanism joint pair will cause abnormal vibration and noise, accelerate fatigue and wear and seriously affect the dynamic performance of machine.
机构铰接副处过大间隙将引起异常的振动与噪声，加速了疲劳与磨损，严重地影响了机器的动态性能。
If the necessary papers for clearance are not available or arrive late, severe penalties or excessive storage charges may be incurred.
如果通关时不能提供必要的单证或单证延期抵达，将会受到严重处罚或需缴纳巨额存储费用。
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