Cov hlau hlau pas nrig kuj hu ua hlau pas nrig, hlau hlau, siv dav hauv cov khoom siv tshuab, kev lag luam tsim khoom, kev lag luam hluav taws xob, cov cuab yeej hlau thiab lwm yam. Hlau ntsuas: Φ 5.5-18mm, cov ntsuas kev cai yog txais tau. Muaj ntau hom hlau pas nrig. Cov hlau hlau carbon tsawg feem ntau hu ua cov hlau mos, thiab cov hlau hlau carbon nruab nrab thiab siab feem ntau hu ua cov hlau tawv. Cov hlau pas nrig feem ntau yog siv ua cov duab kos, thiab kuj tuaj yeem siv ncaj qha ua cov khoom siv hauv tsev thiab ua tiav rau hauv cov khoom siv kho tshuab. Cov hlau hlau pas nrig siv los tsim cov hlau hlau stainless, hlau caij nplooj ntoos hlav stainless, hlau tsis xeb thiab hlau hlau rau cov hlau hlau stainless. Nrog rau kev nce qib ntawm kev siv tshuab ntau lawm, cov hlau hlau square, hexagonal, kiv cua-puab thiab lwm yam hlau hlau zoo li tshwj xeeb tau tshwm sim; Qhov txwv sab saud ntawm txoj kab uas hla tau nthuav dav mus rau 38 hli; Qhov hnyav ntawm lub phaj tau nce ntxiv los ntawm 40-60 kg txog 3000 kg. Vim yog kev txhim kho ntawm cov thev naus laus zis kho cua sov tshiab tom qab dov, qhov ntsuas ntawm qhov chaw ntawm hlau pas nrig tau pom tseeb txo qis, thiab cov qauv me me thiab cov khoom tau txhim kho zoo heev.