环鼓，回族棰击膜鸣乐器。流行于宁夏、甘肃等省区。有单面和双面两种形制。
循环鼓风机 recirculating blower ; recycle blower ; recycle gas blower
鼓环桥 [耳鼻喉] annulus bridge
鼓室环锯 tympanic trephine
鼓风环式冷却机 rotary forced-air cooler
鼓环 [解剖] tympanic ring ; [解剖] Anulus tympanicus ; annulus membranae tympani
小爱环-O拨浪鼓蓝色 Tiny Love Ring-O Rattle, Blue
鼓循环 drum loop
循环硒鼓 HD
鼓环咬骨钳 tympanicringrongeur
环保打印硒鼓 Environmental print selenium drums ; Environmental print cartridge
磁心贮记器磁心像炸糖环的形状，存贮信息。它是磁化贮记器的一种。大量的信息存贮，现在多采用磁碟、碟鼓或磁带，用磁心贮记器较少。
Core memory a type of memory that stores information on magnetically charged doughnut shaped cores. mass storage is currently mostly on magnetic disk drum or taoe rather than core.
重力荷载作用下网筒结构外鼓及交叉柱间轴力差异将使环梁受到较大的拉力。
The exterior tube structure exerts radial outward forces, and the diagrid columns have significant difference in axial force.
利用空气煤油（苯甲酸） 水体系，测定了未装填料和分别装填板波填料、丝网填料、压延孔环填料的鼓泡萃取塔水力学性能和传质性能。
Experimental measurements of hydrodynamics and mass transfer have been carried out with air kerosene (benzoic acid) water system and three typical kinds of packing.
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