N the larva of a dipterous fly, Callitroga macellaria, that develops beneath the skin of living mammals often causing illness or death 螺旋蛆
Scarcity of deer in some areas of Texas is attributed to the screw-worm.
德克萨斯州某些地区鹿的稀少就是这种螺旋锥蝇造成的。
Scarcity of deer in some areas or Texas is attributed to the screw-worm.
德克萨斯州某些地区鹿群稀少造成了这样螺旋锥蝇的出现。
Therefore, double screw compressor and worm compressor compared, in the same speed of the units inside less number of exhaust air ripple, big air flow noise.
因此，双螺杆压缩机与蜗杆压缩机相比，在相同转速下单位内排气次数少，气流脉动大，气流噪声大。
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