Xov xwm kev lag luam
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Nta ntawm Excavator O-RING Foob Cov Khoom Siv
O-rings (O-rings) yog lub nplhaib roj hmab sealing nrog ib ncig hla ntu.Vim nws O-shaped cross section, nws hu ua O-ring, kuj hu ua O-ring.Nws pib tshwm sim nyob rau hauv nruab nrab ntawm lub xyoo pua 19th, thaum nws tau siv los ua ib qho kev sib khi rau lub cav cav cyl ...Nyeem ntxiv