1/2英寸内螺纹管道连接器
internal one-half inch thread conduit connection
GK型等强钢筋锥螺纹接头
GK-type same-strength conical twisted splice
SAE干式密封短外锥管螺纹
dryseal sae short external taper pipe thread
V形螺纹
thread
V
vee-type thread
triangular thread
V-[type] thread
shape-V thread
V-thread (triangular thread