Shandong China Coal Import & Export Co., Ltd.

In order to help the innovation and development of foreign trade enterprises in the city, and cohesion to jointly promote the high-quality development of cross-border trade in the city, on the afterno

On June 17, Niu Huilan, Vice Chairman of the Jining Municipal Association for Science and Technology, Yu Songyuan, Deputy Secretary General of the Municipal Association for Science and Technology, Zha

The mounting height (H) of the dowty retarder is the distance from the highest point of the sliding cylinder head of the dowty retarder to the center of the rail top surface.

The dowty retarder is a kind of equipment which uses hydraulic oil and elastomer as the medium, is installed on the rail, contacts with the wheel through the cap of the sliding cylinder, and plays the

On the afternoon of June 12, a batch of mining single hydraulic prop equipment ordered by Shanxi Xinzhou merchants is loaded and shipped in China Coal Group's intelligent equipment manufacturing works

The construction speed is the maximum speed that the dowty retarder structure allows the vehicle to pass through. According to the original standard: "the construction speed of various dowty retarder