Finned Tube
Tsev 12 Rau sab kawg 1/2
Raws li ib qho ntawm cov ua finned tube tuam ntxhab thiab cov muag khoom nyob rau hauv Suav teb, peb sov siab txais tos koj los yuav cov khoom lag luam zoo finned raj rau muag ntawm no los ntawm peb lub hoobkas. Tag nrho cov kev cai tsim khoom yog nrog cov khoom zoo thiab cov nqi sib tw.
