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Witeg® ASTM Standard Long Taper Glass Joints, -Cone & -Socket for -14/23, 19/38, 24/40~45/50, ASTM, Boro-glass 3.3, 표준 테파 조인트 Witeg® ASTM Standard Long Taper Glass Joints, -Cone & -Socket for -14/23, 19/38, 24/40~45/50, ASTM, Boro-glass 3.3, 표준 테파 조인트 Witeg® ASTM Standard Long Taper Glass Joints, -Cone & -Socket for -14/23, 19/38, 24/40~45/50, ASTM, Boro-glass 3.3, 표준 테파 조인트