What is the function of Ohh! Natural Pest Control Collar?

天然精油驱蚤颈圈的功能？

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The downhole stabilizer location adjuster, fixed between the bit and the drill collar, is a special tool for continual deviation control of a slant hole.

井下稳定器安放位置调节器是斜井旋转钻井时实施井斜连续控制的专用工具， 安装在钻头与钻铤之间。

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So the means cannot control leak the material, then possibly is the graphite pad or the copper collar wears (for example seal face not to be smooth seriously, gap big).

如此办法不能控制漏料，则可能是石墨垫或铜环磨损较严重(如密封端面不光滑，间隙大)。

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There are a number of different electronic training aids, including an anti-bark collar, remote control collars used to control any unwanted behaviour, electric shock training leads and electric boundary or "freedom" fences.

BBC: Joan Andrews and Bonny

Traditional blue-collar labor is often associated with rational control, along with modern high-reliability organizations, such as military, public safety, nuclear energy production, and oil platform operations.

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At one point, the BLS listed some 200 jobs as blue collar that ran the gamut from auto mechanics to crane operators, from garbage collection to pest control.

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