Mask & Respirator Breathing Resistance Tester can be used to determine the inspiratory and expiratory resistance of masks under specified conditions. Another additional function of this machine is flow impact test of the breather valve.
LE series golf rangefinder is a classic medium and long distance rangefinder (6-1500m model is optional), with range measurement/ angle measurement/ altitude measurement/ speed measurement/ horizontal distance measurement/ vertical distance measurement/ t
The frame is made of plastic material and the temple is design of metal material to lightenPressure on both sides of the face. Optimized high definition plastic lens, hardened and crush resiatance, wearproofand waterproof, bringing a better experience. Ma