Lead or lead lined objects or materials will shield one from x-rays up to a certain thickness of lead.- Ricardo A. Scott R.T.R(ARRT), B.A.,J.D. Radiology expert.
Lead
An electrical device used to protect electronic devices against power fluctuations against power surges by tripping or blowing before those devices can be damaged. They are a very low cost insurance policy built in to equipment to protect it against costly damage.
eraser shield
Circuit breaker or a fuse
It is a device used to protect Electric Network and loads
Fuse or MCB
Vaccination
Vaccination
Edward Jenner
A device, composed of sharp points and/or knife edges, that discharges powerline overvoltages to ground. The term lightning arrestor is a misnomer, as these devices cannot protect against a direct strike to the powerline!
Dust resperator
by there wing to fly