The Design of Automatic Testing System for Detecting the Flaws in Ring-shaped Welding Seam of Welded Powder Canister with Ultrasonic是什么意思_The Design of Automatic Testing System for Detecting the Flaws in Ring-shaped Welding Seam of Welded Powder Canister with Ultrasonic在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句