biased-valve oil well pump  偏置阀式抽油泵

electric pump oil well  电泵井

electrical heating rod+feedback viscous oil well pump  电热杆+反馈式抽稠泵

inner wall of oil well pump  抽油泵筒内壁

oil- well pump  抽油机

oil well pump efficiency  油井泵效

Oil-well Pump  抽油泵

superdeep low leakage oil well pump  超深低漏整筒抽油泵

superdeep oil well pump  超深油井抽油泵

2-oil-pump-driven  不良反应; 药物不良反应; 药品不良反应; 药品不良反应(ADR); 药物不良反应,儿童

AC Lub oil pump  交流润滑油泵

AC lube oil pump  自身免疫性胰腺炎; 交流润滑油泵

AC motor lubricating oil pump  交流润滑油泵

air side seal oil pump  空气侧封油泵

allocation factor for oil well and water injector  油水井分配系数

Analysis on Startup Problems of DC Oil Pump  微动疲劳(FF); 直流油泵启动问题分析

arc-trochoidal gear oil pump  圆弧-泛摆线齿轮油泵

assist lubricating oil pump  辅助润滑油泵

automotive engine oil-pump narrow-width chain  汽车发动机用窄型链