这个倒链（油压千斤顶、螺旋千斤顶）的起重能力为 5 吨。

The lifting capacity of this chain hoist (hydraulic jack, screw jack) is 5 tons.

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分析了滚刀齿高和齿顶倒圆半径对所切齿轮齿根弯曲应力的影响。

And it analyzed that hob tooth height and tooth top pour round radius impacted on gear tooth root crooked stress.

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结果表明，倒生的棉花胚珠可以分为合点区、株柄顶区、腰区和珠孔区。

The results showed that ovule surface might bedivded into the chalazal zone, crest zone, middle zone and the micropylezone.

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