特殊用法access opening1.检修孔, 人孔admission opening1.进气[汽]孔automatic opening1.自动断开[打开]automaticdischarge opening1.自动排气口burner opening1.燃烧器口clear opening1.净孔; 净空; 净宽; 有效截面(涵管等的)clear door opening1.门口宽度cloacal opening1.泄殖孔culvert opening1.涵洞孔daylight opening1.(压机)压板间距delayed opening1.延迟开伞die opening1.模腔, 模槽discharge opening1.卸料口end opening1.下口exhaust opening1.排气口extraction opening1.抽汽口fall opening1.秋季开学feed opening1.下料口feeder opening1.供料机通道口, 通道入口filling opening1.填充孔; 注入孔flare opening1.漏斗口; 漏斗扩大的部分flooding opening1.洪水桥孔impact opening1.冲击孔inlet opening1.进口; 进水口; 进风口iris opening1.膜孔jaw opening1.(板手, 钩子的)开度, 开口处lens diaphragm opening1.透镜光阑孔mechanicalness opening1.机械孔径(光阑孔)mill roll opening1.滚隙receiving opening1.装料孔refill opening1.加油口roll opening1.滚距root opening1.间隙self opening1.自动开启式side feed opening1.侧面进料口skylight opening1.天窗slide valve opening1.滑阀口slot opening1.齿缝开度split opening1.(交易所开盘时)行市猛跌stigmatic opening1.气门; 喷水孔throttle opening1.开节流阀ventilating openings1.(煤油灯的)通风孔vertical feed opening1.垂直进料口water opening1.【海】冰间水面opening of bid1.开标, 开启承包书opening of bond1.键的断开opening of cock1.旋塞开度opening of link1.键的断开opening of the shelter wood1.受光伐opening of tuyere1.风口, 吹风管嘴opening of wrench1.扳手开口