Bolts ua los ntawm high-strength steel, los yog bolts uas yuav tsum tau ib tug loj pre-tightening quab yuam, yuav hu ua high-strength stud bolts. High-strength stud bolts feem ntau yog siv rau kev sib txuas ntawm cov txuas hniav, rails, high-pressure thiab ultra-high-pressure khoom. Qhov tawg ntawm cov bolts no feem ntau yog cov pob txha tawg. Lub siab-lub zog stud bolts siv nyob rau hauv cov khoom siv ultra-siab siab xav tau lub prestress loj nyob rau hauv thiaj li yuav xyuas kom meej lub sealing ntawm lub thawv.
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