英语翻译A gear having tooth elements that are straight and paral

英语翻译
A gear having tooth elements that are straight and parallel to its axis is known as a spur gear.A spur pair can be used to connect parallel shafts,however,can also be connected by gears of anther type,and a spur gear can be mated woth a gear of a different type.
Helical gears have certain advantages; for example,when connecting parallel shafts they have a higher load-carring capacity than spur gears woth the same tooth numbers and cut with the same cutter.Helical gears can be also be used to connect nonparallel,non-intersecting shafts at any angle to one another.Ninety degrees is the most common angle at which such gears are used.
Worm gears provide the simplest means of obtaining large ratios in a single pair.They are usually less efficient than parallel shaft gears,however,because of an additional sliding movement along the teeth.Because of their similarity,the efficiency of a worm and gear depends on the same factors as the efficiency of a screw.
抱歉！第一段第二句有误，改为A spur pair can be used to connect parallel shafts only.Parallel shafts,however,can also be connected by gears of anther type,and a spur gear can be mated with a gear of a different type.第二段第二排的woth是with.
别用翻译器来糊弄！那还没我自己翻译的通常！

齿轮齿是整齐并与轴平行的是正齿轮.正齿轮只可以用来连接平行轴,然而,平行轴也能用另外一种齿轮来连接.正齿轮可以和另外一种类型的齿轮配对使用.
斜齿轮有一定的优势,例如,当连接平行周的时候,他们比有同样齿数的正齿轮更有承压能力,并可以用同样的刀具切割.斜齿轮也可以在任何角度来连接非平行、非相交轴到另外一个上.90度角是这种齿轮经常应用的角度.
蜗轮提供获得一对大比率齿轮最简单的方法.他们通常没平行轴齿轮有效率,尽管他们有额外的沿齿滑动.因为他们类似,依赖着一样的因素,蜗轮和齿轮和螺杆一样有效率.
楼主,我不懂机械的,可能翻译的不准确,可以结合您的实际经验,帮我解释一下我哪里有错误么?