Brakes, tyres and roads all create tiny air borne particles as they wear out.

刹车，轮胎和道路在磨损时都会产生微小的空气颗粒。

Many factories and commercial activities produce air-borne emissions.

很多工厂和商业活动排放废气。

The seed-borne, the air-borne for conidia and the remains plant-borne in soil were major factor of infection and spread.

其传播途径以种子带菌、空气中分生孢子浮游及土壤中植株残体带菌等为传播发病的主要因素。

Note: Valves that are assembled and tested without silicone lubricants have a potential exposure to air-borne silicone as well as during shipping after they leave the plant.

注意：尽管阀门的组装和测试都是在无硅酮润滑剂环境下进行，但是出厂后，在运输期间，仍然可能有暴露在空气中的硅酮下的可能。