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chisel bit
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bridg.constr.
冲击钻
construct.
冲击式
一字形
钻头
eng.geol.
冲击式一字形钻头
;
扁凿钻头
;
鑽頭
hydroel.st.
一字形冲击式钻头
shipb.
冲击钻头
tech.
凿形钻头
;
凿头
;
单刀钻冠
;
冲击式钻头
;
取样钻头
chisel bit
:
24 phrases
in 6 subjects
Bridge construction
1
Drilling
3
Engineering geology
4
Mining
2
Oil / petroleum
2
Technology
12
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