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MTT××××2009
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Coal Mine Technical specification for vertical shaft
Sinking by Freezing Method
(Ȉ)
200×××××?ƒ 200×××××L@
SE½†3ÁSü5 Ø9 ?ƒ
" Q
CONTENTS
1 95 ……………………………………………………………………………………………………8
2 ŒÔ