http://lxjz.xml-journal.net/ Advances in Mechanics lxjz@cstam.org.cn lxjz@cstam.org.cn en lxjz@cstam.org.cn 1000-0992 http://lxjz.xml-journal.net/article/doi/10.6052/1000-0992-1971-3-J1971-006?pageType=en Personal use only, all commercial or other reuse prohibited 力学进展. 1971 1(3): 0-0. article doi:10.6052/1000-0992-1971-3-J1971-006 10.6052/1000-0992-1971-3-J1971-006 力学进展 1 3 http://lxjz.xml-journal.net/article/doi/10.6052/1000-0992-1971-3-J1971-006?pageType=en 0