半圆管惯性分离器
semiround-pipe inertia separator
全流通半圆管夹套
full circulation semicircle pipe jacket
薄壁圆管
thin wall cylinder
thin-walled pipe
thin walled tube
thin tube
thin-wall circular tube
circular thin walled tube
thin-walled cylindrical tube
thin-wall cylindrical
单侧套管护壁
unilateral double-pipe protecting borehole wall blasting
双侧套管护壁
bilateral double-pipe protecting borehole wall blasting
500t半圆体
500 t semi-circular cylinder
凹半圆铣刀
half-round concave milling cutter