袁理仲, 顾学仁. 50tm塔机起升机构变速器设计[J]. 土木与环境工程学报（中英文）, 1992,14(2).

Yuan Lizhong, Gu Xueren Dept.of Mechanical and Electrical Engineering. A TRANSMISSION DESIGN IN LIFTING MECHANISM OF 50tm TOWER CRANE[J]. Journal of Civil and Environmental Engineering, 1992, 14(2).

袁理仲, 顾学仁. 50tm塔机起升机构变速器设计[J]. 土木与环境工程学报（中英文）, 1992,14(2). DOI： 10.11835/j.issn.1674-4764.1992.02.011.

Yuan Lizhong, Gu Xueren Dept.of Mechanical and Electrical Engineering. A TRANSMISSION DESIGN IN LIFTING MECHANISM OF 50tm TOWER CRANE[J]. Journal of Civil and Environmental Engineering, 1992, 14(2). DOI： 10.11835/j.issn.1674-4764.1992.02.011.