The pressure wave penetration and reflection properitics at a valve, which is located in a conduit, are discussed, And the Penetration and reflection coefficients are derived.

Penetration performance in surface layer of concrete target was analyzed by stress wave damage theory, calculating method base on "simplified equivalent resistance line" was presented.

Furthermore, the deposition rate increases per unit of welding current by decreasing wire diameter, and adjustment of the penetration depth is enabled by alternating current wave form and polarity.