Q42Y形三通球阀Q42

J21BJ21B外螺纹氨用截止阀

J11BJ11B内螺纹氨用截止阀

J42BJ42B角式氨用截止阀

J41BJ41B氨用截止阀

J11WJ11W不锈钢内螺纹截止阀

J11WJ11W苏式内螺纹截止阀

VQ47,VQ40 VVQ47,VQ40 V型球阀

单向球阀单向球阀 圆法兰

VH3VVH3V二位三通高压球阀

J41HJ41H锻钢法兰截止阀

J41HJ41H美标法兰截止阀