rope slipping造句
Nolossofcarpositionduringlongerpowerfailureorropeslipping.Iftheobjectisverticalandsmooth,andthereisdangeroftheropeslipping,takeanextrawraparoundtheobject....
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slipping造句
Softnon-skidrubberkeepsportablesfromslipping.Becausewecalculatedheretherequirementforjustnotslipping.Doesitnotruntheriskofslippingintoavarietyofethicalhumanism?It'sadeep,softpop,likeacorkslippingfree...