[1]李旭.激光离焦量对光束质量及焊接效果的影响研究[J].武汉职业技术学院学报,2017,(03):87.[doi:2017/6/30 0:00:00] LI Xu.Study on the Impact of Laser Defocus on Beam Quality and Welding Effect[J].Journal of Wuhan Polytechnic,2017,(03):87.[doi:2017/6/30 0:00:00]