视频：斜风井防爆门（英文版）

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SHANDONG CHINA COAL  INDUSTRY& MINING GROUP

CHINA MINING&CONSTRUCTION EQUIPMENT BRANCH

SHANDONG CHINA COAL  IMPORT & EXPORT CO., LTD.

SHANDONG CHINA COAL GROUP  DRILLING MACHINE

SHANDONG CHINA COAL MINING  SINGLE HYDRAULIC PROPS CO., LTD.

SHANDONG CHINA COAL MINE  CAR CO., LTD.

SHANDONG CHINA COAL  U STEEL SUPPORT CO., LTD.

SHANDONG CHINA COAL  MINING WINCH CO., LTD

SHANDONG CHINA COAL  LOCOMOTIVE CO., LTD.

CHINA COAL MANUFACTURING GROUP CO,. LTD.