helical是什么意思

用法例句

Development and application of horizontal screw type mine car cleaner;

卧式螺旋清车机的研制与应用

Refitting of Large Diameter Roller Screw Lathe;

大直径卷筒螺旋车床的改造

The Manufacturing Technique of the Screw Component;

进口螺旋国产部件的加工工艺

Experimental research on automatic fouling removal capability of hydro-dynamic spiral;

流体动力螺旋自动清洗除盐能力模拟试验研究

Mathematical Model and Moulding Design of Spiral Blades in Taper Pre - mixer of Flour;

锥型面粉预混合机螺旋叶片的数学模型及造型设计

Experimental reaserch on the spiral inserts of fouling preventing inheating tubes of evaporators;

蒸发器加热管内螺旋防垢保洁试验研究