Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
This is a warning socket, according to the principle of the fire emergency lights. If the plug is inserted in the outletdid not
disconnect the plug on the red warning light will light up when a sudden power failure, it will remind people to pull the plug and
unplug avoid sudden electricity on electrical appliances cause unnecessary harm.This design is a warning.
NanJing forestry University,PRC
Nan Zhang Xiaoran Wang Yin Zhao