ORDINARILY PROBLEM
- 1.What is anti-fire safe design ?Aug 20,2012
- 2.What is anti-static device ?Aug 20,2012
- 3.What is automatic body cavity relief ?Aug 20,2012
- 4.What is Emergency sealing ?Aug 20,2012
- 5.What is double block&bleed(DBB) design ?Aug 20,2012
- 6. How about the underground ball valve feature ?Aug 20,2012
- 7. What is your blow-out proof stem design?Aug 20,2012
- 8.What is oviko top entry ball valve feature ?Aug 20,2012
- 9. What is Oviko V type ball valve feature ?Aug 20,2012
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