बिना जरूरी टेस्ट किए NASA ने कैसे लॉन्च कर दिया आर्टेमिस मिशन? – nasa Artemis 2 Wet Testing
Wet testing or wet dress rehearsal (WDR) is a very important process before rocket launch. In this, the entire countdown process is practiced by filling the rocket’s fuel tanks completely with liquid hydrogen and liquid oxygen (cryogenic propellant). read more Its purpose is to see whether the tanks, pipelines, valves, seals and ground systems will…