亚洲国产成人精品女人久久丨日韩av福利在线观看丨国产日韩欧美二区丨国产高清av久久久久久久丨国产好片无限资源丨色哟哟免费观看丨99亚洲欲妇丨日韩精品一区二区在线观看丨亚洲小说图区综合在线丨久久久女女女女999久久丨很黄的网站在线观看丨av鲁丝一区鲁丝二区鲁丝三区丨综合狠狠丨色77久久综合网丨国产一级片a丨亚洲国产精品18久久久久久丨亚洲色播爱爱爱爱爱爱爱丨成人av一区丨中文字幕岛国丨国产亚洲精品久久久久久老妇小说丨男女啪啪激烈高潮喷出gif免费丨国产亚洲精品久久久久婷婷瑜伽丨久久久性色精品国产免费观看丨久久精品第九区免费观看丨性av网

Jiangsu General Science Technology Co won the Technology Innovation Award at the seventh Summit Forum for China Eucommia Industry Development in Hunan, Nov 28. It’s the only tire brand in domestic to win the award.

The modern species of Eucommia is known as the "hard rubber tree", while its latex is easy to crystallize at normal temperature and its amount in the bark is relatively small, about 4 percent by weight.

After years of unremitting efforts, Jiangsu General Science Technology Co applied Eucommia’s latex to tread rubber successfully, making abrasive resistance increase 30 to 40 percent. Vehicles with such tires are expected to run 300,000 kilometers.