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to phrases
坑道口
gen.
adit
坑道
人
口
construct.
adit opening
geol.
adit entrance
坑道口
hydroel.st.
adit opening
tech.
gallery opening
坑道
出入
口
tech.
adit opening
坑道
入
口
tech.
adit entrance
坑道 口:
4 phrases
in 2 subjects
Engineering geology
1
Technology
3
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