There are many types of bolt with different shapes like hex bolt, carriage bolt, square head bolt, stud bolt, ball head bolt and so on.http://www.yuchaobolt.com/bolt/

Another indispensible equipment is steel pipe printing marking machine. Companies that produce metal pipes, regardless of whether they are involved in construction, aerospace, electronics, etc., code these materials to enable traceability, display important production data, and prevent counterfeiting. These codes generally take the form of numeric lot numbers or machine-scannable bar codes.http://www.westwu-machine.com/....api-pipe-production-

The way a ball valve functions makes it easy to see if the valve is open or shut. The handle that operators use to adjust where the sphere is aligned with the flow when the valve is open, and it is perpendicular when the valve is closed. And the ball valve can be devided into many different types for different functions, such as floating ball valve, trunnion mounted ball valve, top entry ball valve, dbb ball valve, subsea ball valve, etc.http://www.tfcvalve.com/ball-valve/

Paint with your watercolors on top of the dried glue design. Add any kind of watercolor wash on top. You don’t have to make it a rainbow, but the rainbow is super fun to paint.http://www.subbuteo.com.cn/main-products/

Pesticides and pesticides intermediates are raw materials used for the manufacture of technical grade of active ingredient by chemical reactions or purification. http://www.purestchem.com/phar....maceutical-intermedi