Siab relay yog ib yam khoom uas ua rau cov hluav taws xob hu ua thaum lub siab ntawm cov kua dej mus txog ib tug predetermined nqi nyob rau hauv lub hydraulic system. Siab relay kuj tseem tuaj yeem txhais tau tias yog cov khoom siv hydraulic uas hloov siab rau hauv hluav taws xob teeb liab. Cov neeg siv khoom tuaj yeem tso tawm hluav taws xob teeb liab ntawm qhov teeb tsa siab los ntawm kev kho lub siab relay raws li lawv tus kheej tsim kev xav tau
