机械驱动传动系机油系统简图
direct drive power train oil system schematic
多井联动抽油系统
multiple well pumping system
绳式悬载抽油系统
cable suspended pumping system
双井抽油机机架
the frame of double-well pumping unit
有杆抽油系统
sucker-rod pumping system
sucker rod pumping system
beam-pumping system
rod pumping system
直线电机抽油机
linear motor pumping unit
变速箱机油系统滤清器
transmission oil system filter
柴油机机油冷却器
diesel oil cooler
lube oil cooler for diesel engine