Judgement of direction of the regulator function in a control circuit is a teaching jungle of the course Automation and Meters in Chemical industry.

化工控制回路中调节器作用方向判断是《化工自动化及仪表》课程中的教学难点。

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Gift cards are a big industry, which is why a number of other start-ups such as gift card marketplaces Cardpool and Plastic Jungle, and Gifi, which has a somewhat similar concept to GiftRocket, have focused on this area.

FORBES: GiftRocket Seeks To Reinvent Gift Cards