Terms for subject Oil / petroleum containing single pole

English	Chinese
double pole single throw	双刀单掷
single pole compensation	单极点补偿
single pole mast	单柱起重架
single pole rig	单杆钻井机
single pole rig	单杆式修井机
single-pole-piece magnetic head	单极磁头
single-pole single-throw	单刀单掷
single-pole switch	单刀开关
single-pole triple-throw	单刀三掷