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一种国内首创的起重机配套设备“SS型锁式安全索具”,在青田问世,并于1989年2月荣获国家专利局颁发的专利证书,现已投入批量生产。该产品是浙江青田县密封件厂在浙江省机电设计研究院的帮助下,吸取国外先进技
A domestic first-type crane supporting equipment “SS type lock safety rigging” was introduced in Qingtian and was awarded a patent certificate issued by the State Patent Bureau in February 1989. Now it has been put into mass production. The product is Zhejiang Qingtian Sealing Factory with the help of the Zhejiang Institute of Mechatronics Design and Research Institute, drawing advanced foreign technology