Peb cov kev pabcuam

Peb lub Hoobkas

Tiancong tau ua tiav cov tshuab tsim khoom, kev sim tshuab thev naus laus zis, pab pawg kws tshaj lij engineers, thiab kev tswj hwm nruj, muab kev pabcuam huab cua.Peb muaj ib pab pawg kws tshaj lij engineers pab neeg uas tuaj yeem pab txhawb koj yuav ua li cas xaiv cov fastener kom raug lossis tsim cov fasteners tshiab.Thiab peb cov neeg ua haujlwm paub txog cov kab ntau lawm lav kev ua haujlwm nruj me ntsis raws li cov neeg siv khoom xav tau.

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Cov lus teb rau cov neeg siv khoom

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