青云翻译

China since 1957 [8] began using hydraulic mining technology still in use today, mainly in China's Liaoning, Jilin, Shandong, Fujian and other areas [9].

Since 1957, China [8] started using hydraulic mining techniques and have been adopted, mainly located in Liaoning, Jilin, Shandong, Fujian, China and other regions [9].

China (8) starts from 1957 to use the water power mining coal technology and to continue to use until now, mainly distributed in local (9) and so on China's Liaoning, Jilin, Shandong, Fujian.

china since 1957 [ 8] introduction of hydro and coal mining technology has been used, mainly in China's Liaoning, Jilin, Shandong, Fujian, and other areas [ 9 ].

Since 1957, China [8] started using hydraulic mining techniques and have been adopted, mainly located in Liaoning, Jilin, Shandong, Fujian, China and other regions [9].