TY - Front. Mech. Eng. A1 - Jialun YANG, Feng GAO, T1 - Singularity loci of an orthogonal spherical two-degree-of-freedom parallel mechanism Y1 - 2009-12-05 JF - Frontiers of Mechanical Engineering JO - Front. Mech. Eng. SP - 379 EP - 385 VL - 4 IS - 4 UR - https://journal.hep.com.cn/fme N1 - 10.1007/s11465-009-0075-0 ER -