Cylindrical thiab Tubular Qib Qws

Tsev Dhau phab 12 Sab tom qab no Rau sab kawg 1/2
Xav tias dawb yuav khoom zoo cylindrical thiab tubular qib qis los ntawm khoom kho khoom muag manufacturers ntawm no. Rau cov lus thiab nqe, txais tos hu rau peb.