液壓扳手由動力頭、工作頭、液壓扳手專用泵以及高壓油管，快速接頭組成。通過高壓油管，液壓泵將動力傳輸到工作頭，驅動工作頭旋轉螺母的擰緊或松開。
The hydraulic wrench consists of the power head, the working head, the special pump of the hydraulic wrench and the high pressure oil pipe, and the quick joint. Through the high-pressure oil pipe, the hydraulic pump transfers the power to the working head and drives the screw nut of the working head to tighten or loosens.
