在天蝎座拥挤的星野背景衬托下显出暗色轮廓，这个多尘的宇宙云的形象让人联想起某种不祥的黑塔。
In silhouette against a crowded star field toward the constellation Scorpius, this dusty cosmic cloud evokes for some the image of an ominous dark tower.
集尘器汲尘器空气加热器洗涤塔引风机鼓风机：各设备的风机进出口。
Device: dust collector, dust drawer, air heater, wash tower, draught fan, blower: import and export fans of different equipments.
集尘器汲尘器空气加热器洗涤塔引风机鼓风机：各设备的风机进出口。
Device: dust collector, dust drawer, air heater, wash tower, draught fan, blower: import and export fans of different equipments.
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