Li-tubing tse kopantsoeng li entsoe ka pipe ea tšepe e nang le carbon alloy e tlaase, ho na le ntho e ntle haholo ho pota-pota khanyetso, e tsejoang hape e le tubing e pota-potileng thobalano, moqolo oa bolelele ba lik'hilomithara tse 'maloa.O ka nka mosebetsi o mongata oa sekolo o etsetsoang hae ho fapana le li-tubing tse tloaelehileng, lisebelisoa tsa li-tubing tse kopantsoeng ka j...
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