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Anonymous users2024-01-24If the welding is external processing, then do the manufacturing cost - processing fee, if the unit processes itself, the welding rod receives the material, and the labor cost is in the salary, without additional calculation.
If you are calculating the welding cost, you must first calculate the material cost is how much welding wire or electrode is used, as well as the cost of welding guns, depreciation of the welding machine, electricity costs, plus labor costs, if it is done external processing, you must add a certain profit, so that the calculation of welding costs is almost the same.
Get help from the police uncle. They are civil servants, and the public service will solve it for you, don't worry.
The hinge of the security door can be welded when it is broken, and it is generally made of metal. . .
Of course it can be used, doesn't this mean that it can't be used after it is used up? Rather, it can be used many times. And do a good job of this door, so you can rest assured that there is nothing to use, thank you Wang Caina.
Then you can only tear down the wall of the doorway or use a toothless saw to break the security door.
No electricity! Low power infrared light can detect whether there is an object occluding.