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Importance of centre distance (a) between twin screws on the design of extruders, driving systems and their ser...

阐述了双螺杆中心距a对主机、传动系统设计及系列化的重要性。

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According to driving type, the driving systems were classified into two groups, including the cylindrical gear system and the planet gear system.

按照传动形式的不同将传动系统分为圆柱外齿轮系和行星齿轮系两类，分析了每一类中多个典型案例。

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Interest is also growing in energy management systems for the home and safe driving technologies for the car.

VOA: special.2010.01.08

Both driving these health systems to borrow more now than in the past.

FORBES: Hospitals Might Be Heading Into Trouble

Across the land, collections are being taken for those who have lost everything, vans with PA systems driving around calling on people to give what they can.

CNN: Tsunami tragedy: Your e-mails

In many product areas, a combination of fiercer competition, more transparency and the introduction of electronic systems is driving down margins.

ECONOMIST: New dangers