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十字形钻头
gen.
crossbit
bridg.constr.
cross bit
eng.geol.
four-point bit
;
square bit
expl.
X-bit
;
X-chisel
geol.
four wing rotary bit
oil
four point bit
;
star bit
tech.
cross-chopping bit
(破碎孔底岩柱用)
十字形 钻头
:
13 phrases
in 4 subjects
Drilling
2
Engineering geology
2
Oil / petroleum
3
Technology
6
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