Concrete mixing and unloading mainly depend on the two spiral mixing leaves, so the design of the helical mixing blades is particularly important.

混凝土的搅拌和卸载主要依靠两个螺旋搅拌叶片，因此螺旋搅拌叶片的设计尤为重要。

The milling machine is often employed to cut spur and helical gears.

介绍了旋片铣削工作原理及其铣刀设计。

It shows the useful value of CFD to diesel helical intake port evaluation.

指出了CFD在评价柴油机螺旋进气道性能中的实用价值。

Gear drawing standards - part 1: for spur, helical, double helical and rack.

齿轮制图标准。第1部分：正齿。螺旋齿。双螺旋齿和齿条。

Objective To evaluate the clinical value of helical CT in the occult fracture.

目的评价螺旋CT在隐匿性骨折中的临床应用价值。