环形: annular; ringlike; ring form ...气: gas隙: crack; chink; crevice阶梯形气隙: graded air-gap环形气室: annular blowout preventer; annular cell环形气体激光器: gas ring laser; ring gas laser封闭环形气力输送系统: closed pneumatic conveying system气隙: air breather; air clearance; air gap; air interstice; air space; air spacing; air voids; airspace of grate; gas gap; ullage形气,形气: physique and function形气缸: v-cylinder形气隔: u trap环形: annular; ringlike; ring form; bight; annularity◇环形癌 annular carcinoma; 环形电路 [讯] loop circuit; ring circuit; 环形公路 belt highway; 环形交通 rotary traffic; 环形交通枢纽 circle; circus; 环形结构 circle structure; 环形联合 circular integration; 环形路 round; 环形山 [天文学] lunar crater; crater; ring structure; 环形天线 loop; box loop; ring antenna; loop antenna; coil antenna; closed aerial; radio loop; 环形铁路 belt(-line) railroad; circuit railroad磁气隙: magnetic air gap空气隙: ag air gap; air space; airgap; daylight clearance空隙;气隙: air gap气隙比: air space ratio ga; air void ratio, gv; airspace ratio气隙场: gap field气隙长: air-gap width气隙法: air-gap method气隙规: air-gagauge气隙线: air gap linet形气管套管: t-shaped tracheal cannula杯形气流计: cup anemometer; cup anemometre变形气压表: elastic barometer地形气候: topoclimate