Manual and auto vital injector , which one better ?

At present there are two kinds of vital injector: Manual and auto.

Manual operation requirement is high, to the doctor is all a matter of experience, relatively more automatic, 

dosage control more accurate.the client asked which one is better, of course from the perspective of 

customer experience or speed, strong adsorbability, almost no leakage phenomenon,

The 2nd generations vital injector gun effect is best!

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