How to make sure the rubber hose will not be worn off?
Dichotomanthes bottom is relatively heavy, very light rubber soles Dichotomanthes end hard rubber bottom are generally very soft rubber is not black, rubber gum is not black, such as natural rubber is yellow or brown, synthetic rubber is mostly white, and yellow and other colors, black color is added to the carbon black the reason, the addition of carbon black to enhance the wear resistance and reduce the cost. There are yellow rubber, for example, some natural rubber is yellow, and some synthetic rubber is yellow.
The sole judgment is as follows at the end of the rubber bottom or tendon tendon end methods: look at the color, color is usually translucent, while the rubber bottom is not.
This depends on experience, not carefully measured out of the value is also a great error
The ink jet machine can mark the laser marking machine on the pipe, and then mark the joint on the joint
