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Anonymous users2024-01-24There is an opening on the top of the nut to align with the direction of the hole on the plate, and the screw sleeve cannot be entered.
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Anonymous users2024-01-23Let's take a nut with a diameter of 10mm as an example
Generally, the length of the nut is 10mm, and the drilling hole on the board is generally 30mm deep, and the thickness of the board is not enough or can not be drilled through, according to the design requirements and product specifications.
The hole diameter of the board is generally smaller than the diameter of the nut.
The nut is divided into upper and lower heads, with edges and corners above, for wrench installation.
There is a spiral wire on the nut, which can be installed with an Allen wrench.
However, some solid wood nuts are directly driven into them by special machines, and they do not need to be installed manually.
The sewer pipe can also be said to belong to the scope of hydropower, but it is installed by the mud shouting hall hydraulic, because the plumber installation may not be able to fit the toilet position, tile height and other issues, so the unified installation by the plasterer + settlement and infiltration car well backfill, at the same time in the hall.
A, B, C, D, question supplement: single choice!! It should be the same as the Housing Acceptance Quality Specification.
If there is a suspended ceiling, a ceiling-type sprinkler is used to be located under the ceiling; If there is no suspended ceiling, the splash tray is under the bottom of the roof sheet, depending on the horizontal distance from the beam. A row of sprinklers must be added to the > combustible ceiling, which is generally sprayed up and down. For details, please refer to the "Code for the Design of Automatic Sprinkler Systems", which has 3 relevant provisions and 1 table.
If it's not man-made, it's landlord repairs. (may be caused by aging).
I don't know what kind of ceiling material you're talking about. >>>More