In life, you can't mess around with hardware furniture screws, change light bulbs, and so on. When we screw it up and screw it up again, we often get entangled in the direction we screwed it up.

Such as changing the light bulb. We are going to remove the old light bulb. Last time you messed up things, you happened to use too much force, but this time you dare not use too much force because you are afraid that it will get tighter and tighter in the wrong direction.

Which direction should the line turn? General rules from screws to missiles

How do you know in which direction it was unscrewed?

Come on, stress with me: the right-hand rule.

Yes, as long as the thread is involved, we have a unified rule in design, the right-hand rule. Ok? Didn’t you say that the right-hand rule judges the direction of the magnetic induction line? It's okay, just use your right hand. This is the right-hand rule.

Stretch out your right hand:

Which direction should the line turn? General rules from screws to missiles

Make a fist with your right hand and extend your thumb. The direction of the thumb is the direction of screwing in and out, and the direction from the back of the hand to the finger is the direction you want to screw.

For example, if you want to unscrew the bulb, then you can press down on your right thumb and clenched your fist. According to the direction from the back of your hand to your fingers, you can twist it hard!

Remember, this is the right hand, not the left hand.

Which direction should the line turn? General rules from screws to missiles

In this way, when you change the spare tire or screw other difficult screws, you will not go in the wrong direction.

Even how to screw on the silencer of the gun and how to screw on the lid of the water cup is common.

Which direction should the line turn? General rules from screws to missiles

Of course, if there are no special requirements, these high-tech things, such as missiles, are all applicable.

Which direction should the line turn? General rules from hardware furniture screws to missiles

Quickly pick up the lid of the water cup or the wired things around it to verify it!