Juchen Li Optimisation of operation path of six-DOF industrial robot arm based on augmented reality. 284 2022 36 Int. J. Manuf. Technol. Manag. 5/6 https://doi.org/10.1504/ijmtm.2022.128723 db/journals/ijmtm/ijmtm36.html#Li22 streams/journals/ijmtm