The opening in the hull of a drillship or other offshore drilling vessel through which drilling equipment passes.
钻井船壳体或者其它海洋钻井船舶的开口部分，钻井设备可以通过其中。
Mini type sea water desalination equipment, Applied to the warship, ocean fishing vessel, offshore drilling platform and island.
小型海淡设备，应用于兵舰，远洋渔船，海上钻井平台，海岛。
Mini type sea water desalination equipment, Applied to the warship, ocean fishing vessel, offshore drilling platform and island.
小型海淡设备，应用于兵舰，远洋渔船，海上钻井平台，海岛。
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