back-pack camera背负式电视摄像机;背负式照相机
back-pack背伞;背负式
back-pack parachute背包式降落伞
KRIS Back-pack克里斯斜挎单肩包
back-pack tank背负式罐
back-pack pump背负泵
back-pack k pump背负泵
back-pack k camera背负式电视摄像机
back-pack k tank背负式罐
N-COUNT（可数名词） A backpack is a bag with straps that go over your shoulders, so that you can carry things on your back when you are walking or climbing. 双肩包