About DL - DUOLING
2020-1-16 · Shanghai Duoling Watson Mining Equipment Co., Ltd. ( DL for short ) was renamed from Shanghai Duoling Watson Machinery Co., Ltd., a Sino-British Joint Venture founded in February 1985. In 2015, to further expand our production scale, the factory was moved from the downtown area of Shanghai to Jinxi Town, Kunshan, half an hour away by car from ...