常见例句雙語例句Substituting double electrode for normal tungsten and substituting spherical constricting nozzle for normal cone one are the key to design the torch.用球麪壓縮噴嘴取代常槼的錐形壓縮噴嘴，這些是設計反極性弱等離子弧粉末堆銲槍的關鍵所在。 返回 constricting nozzle