98无人区码一码二码三码软件,巴西肥妇大白屁股毛茸茸,日本毛片的免费高清视频,日本免费无码A专区在线观看

DC Series flanged eccentric butterfly valve?incorporates a positive retained resilient disc seal and either an integral body seat.?The valve has three unique attributes: less weight, more strength and lower torque.?

?

Typical application:

1. Water works and water resource project

2. Enviroment Protection

3. Public Facilities

4. Power and Public Utilities

5. Building industry

6. Petroleum/ Chemical

7. Steel. Metallurgy