The Pressure Gauge is used for a period of time, but the gauge pressure is not stable, or the pressure gauge is removed for maintenance, we sometimes find a pointer to a pointer to the original straight sword has become scimitar shape, if you look carefully, in the "back" will leave little dent or the size of the depression obviously, the pointer is bending.
Bending pressure gauge pressure gauge pointer, a relative check nails, "the" bent down, this is because the pressure gauge at work when the pressure relief is too fast, too fast, so that the pointer violently and repeatedly hit the nail plate check. This is generally in the lower side of the pressure gauge pointer, pointer and check the location of the contact pin, can be seen by the impact of severe impact, traces of this site will leave the gap depth.
There is a relative pressure check dial "back" to the curved nail. This is because the pressure gauge is used, pressure is too large, too fast to the pressure gauge pointer clockwise disc check and nail bending impact. The same will leave a gap in the upper side of the pressure gauge pointer.
The gauge pressure of the material is generally Aluminum Alloy plate, if the pressure gauge pointer material is too thin, the material is too soft, the reason is als
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