Dab tsi yog cov kauj ruam los hloov cov chaw khawb

Yuav ua li cas hloov cov seem ntawm cov excavator
{{01. Sealant yuav tsum tau siv kom ntau li ntau tau li sai tau yog tias tsim nyog, kev pleev xim tuaj yeem thov kom ua tiav qhov zoo tshaj plaws ntawm cov nyhuv zoo tshaj plaws.

{{02. Ua ntej sib dhos cov cuab yeej roj hmab seasing, cov tsos zoo.}}}}}}}}}} .

3.}}}}}}}}}} х easeမeaseမ andု and်းhu thiab ntxuav lub zog thiab kos li qub.

{{04. sib sau ua ke nyob rau hauv cov kab mob huv si ntawm cov chaw ua haujlwm dawb los ntawm kev sib tsoo, khawb, burrs thiab lwm yam txuas.

Cov haujlwm ua haujlwm nruj thiab kho cov kev teeb tsa yog tsim nyog los tiv thaiv deformation tshwm sim los ntawm kev txhim kho tsis raug {}}