When installing the Series 4700, it is recommended that galvanized steel back up rings be used behind the valve flanges.

在安装系列4700夹管阀时，建议在阀门法兰后面采用镀锌钢支撑环加固。

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The accidental quenching, occurring in the sintering process, will make the steel back of a powder alloy brake lining brittle and useless.

粉末合金刹车片在烧结后有时会意外淬火，造成刹车片钢背脆化而报废。

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And dirty steel belt surface, impurity and Pb phase accumulation during alloy belt manufacture lead to worse adhesion between alloy layer and steel back.

而在合金带的生产过程中，钢带表面未清洗干净，存在杂质及铅相偏聚等，是导致合金层与钢背之间结合不良的主要因素。

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She fell back to Earth, but the steel-spring bustle just bounced her back up as high as before.

VOA: special.2009.11.28

And Sue wore a beautiful white dress with a huge steel-spring bustle in the back.

VOA: special.2009.11.28

Alcoa, he said, is working with manufacturers to replace the steel back plates to lessen the load and also to deal with the thermal management.

FORBES: Ali Conf: Consumer Electronics Use Of Aluminum Growing Strongly - Alcoa

This has brought thick steel back into fashion for the main fighting forces and has also created a market for tens of thousands of patrol vehicles that are specifically designed to resist mines, bombs and rockets.

ECONOMIST: Defence sales

Ukrainian courts have handed the steel company back to the state. (see: " Ukraine Seizes 'Total Control' Of Private Steel Mill") Meanwhile, Pinchuk and Akhmetov have filed a complaint in the European Court for Human Rights.

FORBES: Another Poisoning Seen In Death Of Ukraine's Pluzhnikov