High pressure die casting valve structure characteristics, materials, testing and transmission
1, the performance of high-pressure casting cut-off valve: Because of the high-pressure cast-off valve seat channel change is proportional to the valve stroke. High-pressure globe valve stem opening...
Make auto parts to make money, but the book is empty! What is the key point of profit?
Make auto parts to make money, but the book is empty! What is the key point of profit? The wise auto boss has realized this... Over the years, the auto parts industry has such a saying: make auto...