循环: circulate; circle; round; re ...密度: density; thickness当量循环密度: ecd; equivalent circulating densityb型环密封: seal by b-ring不过环密封: no-go annulus seal浮动环密封: floating ring seal浮环密封: floating ring seal; floating-ring seal固定环密封: tightening ring packing滑环密封: slide ring sealing活塞环密封: piston ring packing胶木环密封: ebonite seal扣环密封: snap ring seal; snap-ring seal下环密封: runner band seal指环密令: charlie's angels 2; charlie's angels: full throttle阻流环密封: restrictive ring seal强制o型环密封: forced o-ring seal双o型环密封: double o-ring seal橡胶o型环密封: seal by elastomeric o-ring转轮下环密封: runner band seal密度: 1.(密集的程度) density; thickness 火力密度 density of fire; 兵力密度 density of troops; 那个国家的人口密度为每平方英里685人。 the population density of that country is 685 per square mile.2.[物理学] (物体的质量和其体积的比值) density 电流密度 current density; 海水密度 seawater density; 水银的密度比水大得多。 mercury has a much greater density than water.; 密度计 densimeter; densitometer; density gage; density indicator; gravitometer 循环: circulate; circle; round; repeat; loop; period; recurrence; cycling; circulating; mixing; circulation; rotation; recursion 循环不息 move in endless cycles; 恶性循环 vicious circle; 四季的循环 the cycle of the seasons; 血液循环 blood circulation; 体外循环 extracorporal circulation; 四程循环 [机械工程] four stroke cycle; 循环水 vadose [recirculating] water; 循环水泵 water circulating pump; 循环小数 repeater; circulator; circulating decimal; periodic decimal; periodical fraction; recurring decimal; repeating decimal不锈钢锥环密封: seal by stainless conical ring; seal with stainless cone-ring; sealbystainlessconicalring; sealwithstainlesscone-ring金属椭圆环密封: metal oval-ring closure; seal by metallic oval-ring空心金属o型环密封: o-ring closure橡胶双o型环密封: double o-ring rubber seal