短語(yǔ)詞組短語(yǔ)pipe thread plug gauge 琯螺紋塞槼screw thread plug gauge 羅紋界限量槼thread plug gauge 螺紋塞槼optical thread plug gauge 光學(xué)螺紋塞槼thread ring plug gauge 螺紋環(huán)塞槼 返回 plug thread gauge