Sealing technology txhim kho theem ib
Nyob nruab nrab ntawm 1926 thiab 1933, Danish inventor thiab tshuab tsim NielsA Christensen ntxiv tsim thiab siv lub voj voog zoo li no.Nws cov txheej txheem (O-ring) tau luam tawm xyoo 1930, patented hauv 1933, thiab yeej ib qho khoom plig loj hauv xyoo 1938.
Post lub sij hawm: Nov-07-2022
