在矿井火灾灾变时期，井巷可通行性主要根据巷道内是否具有高温有毒有害气体而确定。
Fire hazard travel ability of shaft and roadway mainly depends on whether or not there are high temperature toxic gases in the roadway conditions.
因此，产品想要参与国际竞争，除了要保证质量外，还要拥有世界通行性的商标来宣传产品。
Therefore, if your product wants compete in the world market, besides the super quality, it must have a trademark acceptable throughout the world as an advertisement of your product.
绿色，与红色相反，意味着安全性；它是道路交通中自由通行的颜色。
Green, as opposed to red, means safety; it is the color of free passage in road traffic.
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