เลขเด่น 1 จับ 2 ตัวบนล่าง เข้าทุกงวดใช้ได้ตลอดชีพ
Whenever I fill my backpack for any outdoor activity, where I will spend a considerable amount of time in remote wooded areas, I always toss in some form of personal protection. This personal protection is mainly for the unfriendly wildlife that is lurking out there. Sure I guess you could try to bang two rocks together to ward of a hungry bear but personally I prefer the "sure thing", like a canister of Bear repellent.
from: http://ezinearticles.com/?A-Safety-Must-Have-For-Backpackers-and-Hikers&id=2646435
