Ensures proper product identification and tractability.

确保产品易于区分识别。

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Regular checking and cleaning of thermostat assembly helps to assure maximum life and proper product function.

温度调节装置的定期检查和清洗有助于保证最长的使用寿命和正常的产品使用功能。

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Usage:Smear proper product in 5 points in your face; evenly spread it over, so as to fully mix it with your skin.

使用方法：取适量分别点涂于脸部5点，均匀延展，使之与肌肤充分融合。

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The council has warned restaurants to buy meat only from reputable suppliers and to ensure the product has proper labelling and documentation.

BBC: Falkirk inspectors find beef being sold as lamb

"I share your frustration that there isn't a national infrastructure for the proper recycling of this product, " says Wendy Reed, who manages EPA's Energy Star program.

NPR: CFL Bulbs Have One Hitch: Toxic Mercury

The second is through proper cooking of the product.

CNN: Should Americans banish the burger?