Double step drum is an integral drum with stepwise flanges and double step sections. It allows the multiple layer rope winding in non-operating portion of luffing mechanism to make drum shorter.

双阶梯卷筒是一种带有阶梯法兰盘和双阶梯截面的综合式卷筒，可在变幅机构的非工作区段使钢丝绳多层卷绕，以缩短卷筒长度；

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This machine is of LV model, double-row, double-step, double function, water-cooling, and intercrossing, fixed, no basic reciprocating piston type air compressor.

本机为L型、两列、两级、双作用、水冷、有十字头的固定式往复活塞空气压缩机。

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This machine V-6/7 is of V model, double-row, double-step, water cooling, fixed reciprocating piston type air compressor.

本机型为V型两列、两级、水冷的固定式往复活塞空气压缩机。

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The second step is to double down on the branding applications that have been responsible for bringing this idea to life.

FORBES: In The Pink: A Branding App Strong Enough To Weather Political Storms

And when you couple it with the fact that for the first time in 30 years we've not only raised fuel efficiency standards but we actually were able to get the entire industry to agree voluntarily to double fuel efficiency standards by the biggest environmental step we've made in the last 30 years on that front.

WHITEHOUSE: Remarks by the President at a DNC Event

LeBron James scored 28 points in 30 minutes, Udonis Haslem had his first double-double of the season and the Heat moved a step closer to wrapping up home-court advantage throughout the NBA playoffs by topping the Bucks 94-83.

NPR: Heat Tie Team Mark With 61st Win, Top Bucks 94-83