Kev loj hlob thiab evolution
Ntau xyoo dhau los, pem hauv ntej thiab nram qab bumpers yog tsim los ntawm cov ntaub ntawv hlau. Lawv tau stamped rau hauv U-shaped channel steel nrog lub thickness ntawm ntau tshaj 3 hli. Qhov saum npoo yog chrome plated thiab riveted los yog welded nrog tus ncej longitudinal beam. Muaj qhov sib txawv loj nrog lub cev. Nws zoo li yog ib feem ntxiv, uas zoo nkaus li unsightly.
Nrog rau txoj kev loj hlob ntawm kev lag luam tsheb thiab kev siv dav hauv engineering plastics hauv kev lag luam tsheb, tsheb bumper, raws li cov cuab yeej tseem ceeb ntawm kev nyab xeeb, kuj tau txav mus rau txoj kev tshiab. Tam sim no, ntxiv rau kev tswj hwm qhov kev tiv thaiv thawj zaug, lub hauv ntej thiab nram qab bumpers yuav tsum nrhiav kev sib haum xeeb thiab kev sib haum xeeb nrog lub cev zoo thiab lawv tus kheej lub teeb. Lub tsheb bumpers pem hauv ntej thiab nram qab yog ua los ntawm yas, uas yog hu ua yas bumpers.