Compared with the conventional presplitting methods, the shaped charge is obviously more effective in presplitting blasting and especially useful in controlling the presplitting slots.
Some related parameters of nozzel installation positi on and the influencing regulation of the slotting numbers of untwisted tube on the yarn strength were researched.
Fitting is used for autobicycle start electrical machiney, Car forced convection air heater, Electric tool electrical machiney waits for miniature electrical machiney rotor slot insert empire paper.