Cov ntsaws ruaj ruaj rau kev tsim kho tshuab yog cov khoom siv tseem ceeb uas siv los tiv thaiv cov kua dej thiab cov pa tawm thiab tiv thaiv kev nkag mus ntawm cov kab mob sab nraud. Lawv tau siv dav hauv cov khoom siv xws li excavators, loaders, bulldozers, thiab cranes. Txawm hais tias feem ntau me me, cov ntsaws ruaj ruaj muaj qhov cuam tshuam ncaj qha rau kev ua haujlwm zoo ntawm cov khoom siv; cov teeb meem xws li kev laus, hnav, lossis kev puas tsuaj tuaj yeem ua rau muaj teeb meem xws li roj to lossis plua plav nkag.
Raws li lawv daim ntawv thov thiab hom kev ua haujlwm, kev tsim kho tshuab foob tau muab faib ua ob hom tseem ceeb: cov ntsaws ruaj ruaj zoo li qub thiab cov ntsaws ruaj ruaj. Cov ntsaws ruaj ruaj feem ntau yog siv los ntawm cov khoom nyob ruaj ruaj- xws li cov yeeb nkab fittings, valve lub cev, thiab flanges -thaum cov ntsaws ruaj ruaj yog ua haujlwm nyob rau hauv cov cheeb tsam uas xav tau kev sib txheeb, xws li piston rods thiab rotating shafts. Cov khoom sib khi uas muaj xws li O-rings, roj foob, plua plav foob, hydraulic lub tog raj kheej ntsaws ruaj ruaj, thiab cov ntsaws ruaj ruaj.
Cov ntaub ntawv foob raug xaiv raws li qhov chaw ua haujlwm tshwj xeeb; Cov ntaub ntawv muaj xws li nitrile roj hmab, fluoroelastomer (FKM), polyurethane, thiab polytetrafluoroethylene (PTFE). Txij li cov ntaub ntawv sib txawv muaj cov yam ntxwv sib txawv ntawm cov roj tsis kam, hnav tsis kam, thiab qhov kub thiab txias, kev xaiv lub foob yuav tsum xav txog cov yam ntxwv ntawm qhov ntev xwb- xws li kev khiav hauj lwm siab, qhov kub thiab txias, qhov nruab nrab, thiab kev txav ceev.
