Once kids started carrying book bags, that bulky traditional lunch box was hard to fit inside."But you can't just throw a sandwich in a backpack ," Jayasekara says.
Pop any small, loose items like pedals or skewers in a small sandwich bag and selotape it to the inside of the box.
取出所有小而零碎的物品如踏板或横杆，装入小袋子，封装进盒子里层。
3
Missile packing box of FRP sandwich construction has higher stiffness, strength and stability than ribbed FRP missile packing box, it can meet higher requirement of product design.