1.Yuav ua li cas kaw kom tiav: Siv cov khoom siv tooj dag rau pob, uas yuav kav ntev thiab tsis xeb / tawm.
2.Clean Xov: Nws yog ib qho tseem ceeb heev rau kev txhim kho, peb muaj ib qho kev soj ntsuam zoo rau qhov no hauv lub hoobkas.
3.Ua nrog cov txheej txheem precision, tsis muaj to thiab ruaj khov, yooj yim rau kev txuas thiab txiav
4.Brass rau corrosion kuj, ductility ntawm qhov kub thiab txias, thiab tsis tshua muaj hlau nplaum permeability
Qauv
A
φ Ib
C
D
L
L1
P
NWS-11 1/4
10
16
S11
11
46.5 ib
23.5 Nws
G1/4
NWS-11 1/2
25
23
4
40
28.5 Nws
G1/2