The liner is a polymeric elastomer coating between propellant and insulation layer or case. The liner-forming is a special step in production of solid rocket motor.

衬层是推进剂与绝热层或壳体之间的高分子弹性体涂层，衬层成型是固体火箭发动机生产中的一种特种工序。

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Otherwise, because of the limitation of IGBT's specified voltage, we must use special step-up transformer, which is more expensive, if we put this device into high voltage power system.

另外，由于补偿装置中igbt模块的额定工作电压的限制，若要将其运用于高压系统需要连接特殊的升压变压器，成本较高。

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The next step is the creation of a small number of special device files.

下一个步骤是创建几个特殊的设备文件。

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Besides sponsoring the Family Home in Vancouver, P&G decided to take an extra step, launching a campaign to provide special monetary support for mothers of U.S.athletes.

VOA: standard.2010.02.20

And we are taking one very special step to protect the health of every child in this land.

BBC: News | UK Politics | Frank Dobson's speech in full

The car is special, a crucial step for Lexus as the company fights to stay abreast of the alternative-drivetrain wars currently being waged at Audi, BMW, Mercedes-Benz.

FORBES: At The LA Auto Show, Lexus Debuts A 500-Horsepower Hybrid

Earlier this month the government took a bold step when special police nabbed Colonel Veselin Sljivancanin, who had been indicted for the deaths of more than 200 Croats captured when the Serbs took the Croatian town of Vukovar in 1991.

ECONOMIST: The Balkans and the European Union