中国机械工程学会包装与食品工程分会会员代表大会会议纪要……………………………4.1中国机械工程学会包装与食品工程分会第二届委员会第一次常委委员会和第1次委员会会议纪要…………………………………………4.3李守仁在中国机械工程学会包装与食品工程分会会员代表大会上的 China Mechanical Engineering Society Packaging and Food Engineering Branch Member Congress minutes summary ................................. 4.1 China Mechanical Engineering Society Packaging and Food Engineering Branch second session of the Committee of the first Standing Committee and the first meeting of the Committee Minutes ................................................ 4.3 Li Shouren at the China Mechanical Engineering Society Packaging and Food Engineering Branch member congress