5.Why there is a gap at the base of a bolt
Latches are for the most part utilized outside, and this gap is waste for water that gets inside the bolt when it downpours — generally the bolt would wind up noticeably corroded. It’s likewise advantageous to oil the bolt through it.
6.Step by step instructions to see whether your telephone is wet inside
Numerous batteries have this extraordinary dampness pointer that resembles somewhat square or a circle, and it changes shading from light to red if it’s wet.
Beginning with the iPhone 5, Apple cell phones have this pointer in the SIM card opening. To have a decent take a gander at the dampness marker, take a stab at utilizing a highlighted amplifying glass or turn your iPhone around underneath a light until you see the pointer unmistakably.