You may have a mechanical ground, but do you have an electrical ground?

A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e. no escape route, smoke, explosion hazard, etc.),...

Nguyên lý cơ bản của hệ thống chống sét trực tiếp

Clip vui, http://tmpccc.com

Hướng dẫn hàn hóa nhiệt exoweld

Giới thiệu thiết Bị chống sét Australia

Worst Fire Safety Demo Ever

FM-200 Fire Suppression Systems