oil and water quenching tank油水淬火槽
oil and gas extraction income油气开采收入
oil absorber油吸收剂
Oikama minnow宽鳍
OHS open hearth steel平炉钢
ohmmeter zero adjustment欧姆表的零点调整
ohmic load电阻负载
ohmic heating欧姆加热, 电阻加热
ohmic drop电阻电压降
ohmic dissipation欧姆(电阻)损耗
ohmic coupling电阻耦合
ohmic conductor电阻线
ogival nose卵形头部
ogival arch尖拱
ogee wingS形前缘机翼
ogee shape S形曲线形
ogee molding葱花线
ogee arch葱形拱
offstage manoeuvring幕后活动
offspur tunnel分岔隧道