According to the type of disconnection switch and the method of feeder automation, the mathematic model of disconnection switch placement was built for distribution networks in the oil field.

结合油田配电网的分段开关类型和馈线自动化方式，给出了配电网开关配置的数学模型。

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A new type of hydraulic control switch with circular adjustment for blocking water in oil well is developed.

研制了一种新型液压控制可循环调层的堵水开关。

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Incidentally, Wendy's rival McDonald's had pledged four years ago that it would switch to a type of oil that cut the level of trans fats in its fries by half.

FORBES

Incidentally, Wendy's rival McDonald's (nyse: MCD - news - people ) had pledged four years ago that it would switch to a type of oil that cut the level of trans fats in its fries by half.

FORBES: Anderson's Wendy's To Fry With Healthier Oil