Gate valve for truncated or on-line media, use different materials, can be applicable to water, steam, oil products, nitric acid, acetic acid, oxidizing medium, urea and other media, used more often in the oil pipeline. Most of the hardware gate valve Dalian type necking design flow to be...

The Xingke Hardware Network understands that, in general, screwdriver common word and cross. Screwdriver models more than these two. But one thing is sure, the screwdriver does not round, because the Round of no torques. The word is to ensure that there are torques, while Cross make the force...