There is lever-type or wedge-type chuck in terms of chuck structure, or pneumatic or hydraulic chuck in terms of source of power supply.

卡盘结构可分为杠杆式或楔式，动力源又有气动和液压之分。

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Autonomous control over supply, via aggregation in unions, became their only source of power.

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Each unit can also serve as a source of electrical power for the military, or emergency response, something always in short supply in forward operating positions.

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