Timer control pump operation time, less expensive and easy to operate.

定时器控制泵的运转时间，较便宜且操作简单。

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Conclusion: the methods are accurate, easy to operate and can control the product quality better.

结论：本方法结果准确可靠，可操作性强，可以更好的控制产品质量。

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Conclusions: the method is accurate, easy to operate and can control the product quality more efficiently.

结论：本法结果准确，操作简便，可以有效地控制产品质量。

youdao

Unlike the majority of existing GPS watches on the market that feature multiple small and hard-to-operate buttons, the one-button control is easy to operate while moving and can be easily controlled in all weather conditions and while wearing gloves.

ENGADGET: TomTom makes own-brand GPS sports watches, no Nike swoosh in sight (updated: details)