石油管外螺纹硬质合金刀杆
carbide tool shank for petroleum pipe external threading
SAE干式密封短外锥管螺纹
dryseal sae short external taper pipe thread
垂直内螺纹管水冷壁
verti cal rifled waterwall temperature difference between adjacent tubes
vertical rifled waterwall
六头内螺纹管
Six head internally ribbed pipe
螺纹管折流杆再沸器
Rodbaffle reboiler with thread tube
垂直内螺纹管
vertical internally ribbed tube
内螺纹管
Internally grooved tube
Internally ribbed tubes
rifled tubing
rifled tube
Rifle-tube
internally ribbed tube
female screw thread pipe
internally-ribbed tube
microfin tube
ribbed tube
interior thread tube
micro-fin tubes
microfin-tube
Internal spinned steel pipe
internal spinned pipe
Inner-threaded copper tube
rifled pipe