"气环"是个多义词，它可以指气环（天文名词）,气环（汽车技术）。
... compression ring 气环 comprex 气波增压器 concentration of emission 排放浓度 ...
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大气环流 [气象] Atmospheric circulation ; General Circulation ; general circulation of atmosphere
大气环境 [环境] atmospheric environment
大气环流模式 circulation pattern of the atmosphere
大气物理学与大气环境 Atmospheric Physics and Atmospheric Environment
大气环流模型 AGCM ; General Circulation Model ; GISS GCM
气环开口间隙 piston ring gap clearance-compression
第二道气环 SECOND COMPRESSION RING
第一道气环 TOP COMPRESSION RING
事实上有两种活塞环，气环和油环。
Actually, there are two types of rings, compressed rings and nil-control rings.
事实上有两种活塞环，气环和油环。
Actually, there are two types of rings, compression rings and oil-control rings.
在这些活塞中，活塞环的数量减少到三个，即两个气环，一个油环。
On these pistons the number piston rings was reduced to three, two compression and one oil-control.
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