Abstract: A salt and a crystal form relating to a nitrogen-containing heterocyclic derivative, a preparation method therefor and an application thereof. In particular, the present invention relates to a salt and crystal form of a compound represented by general formula (I), a preparation method therefor, a pharmaceutical composition comprising a therapeutically effective amount of the crystal form, and a use thereof as a KRAS G12C mutation inhibitor in the treatment of diseases or conditions such as leukemia, neuroblastoma, melanoma, breast cancer, lung cancer and colon cancer. Each substituent in the general formula (I) is the same as defined in the description.

Abstract: Disclosed is an oral irrigator easily disassembled and assembled, and the oral irrigator includes: an oral irrigator nozzle, an oral irrigator upper cover, an oral irrigator inner shell, an oral irrigator main shell and an oral irrigator bottom cover. One end of the oral irrigator main shell is provided with the oral irrigator inner shell and the oral irrigator upper cover in sequence, and the other end of the oral irrigator main shell is detachably connected to the oral irrigator bottom cover. The oral irrigator main shell is provided with a first accommodating cavity and a second accommodating cavity in sequence, and the first accommodating cavity and the second accommodating cavity are separated by a charging base; a water pump mechanism is provided in the first accommodating cavity, and the second accommodating cavity is configured to store water. The oral irrigator inner shell is provided with a locking assembly.

Abstract: A water spray gun including a gun body. The gun body includes: an inner part including a water channel; an outer part including a handle; an upper part including a spray bar, a water spray plate, a lock button, and a pull rod including a plug; and a lower part including an water stop plug disposed at an distal end thereof, a water stop plate, a water stop spring, a first sealing ring for stopping water, and a second sealing ring for introducing water. The water channel is disposed in the inner part of the gun body. The handle is movably mounted on the outer part of the gun body via a pin. A water sealing position of the water spray gun is disposed at the distal end for keeping the water out of the gun body and for preventing the gun body from becoming stuck and rupturing.

Abstract: A water spray gun including a gun body. The gun body includes: an inner part including a water channel; an outer part including a handle; an upper part including a spray bar, a water spray plate, a lock button, and a pull rod including a plug; and a lower part including an water stop plug disposed at an distal end thereof, a water stop plate, a water stop spring, a first sealing ring for stopping water, and a second sealing ring for introducing water. The water channel is disposed in the inner part of the gun body. The handle is movably mounted on the outer part of the gun body via a pin. A water sealing position of the water spray gun is disposed at the distal end for keeping the water out of the gun body and for preventing the gun body from becoming stuck and rapturing.

Abstract: Polymerization of siloxane is improved using a gypsum-based slurry that includes stucco, Class C fly ash, magnesium oxide and an emulsion of siloxane and water. This slurry is used in a method of making water-resistant gypsum articles that includes making an emulsion of siloxane and water, then combining the slurry with a dry mixture of stucco, magnesium oxide and Class C fly ash. The slurry is then shaped as desired and the stucco is allowed to set and the siloxane polymerizes. The resulting product is useful for making a water-resistant gypsum panel having a core that includes interwoven matrices of calcium sulfate dihydrate crystals and a silicone resin, where the interwoven matrices have dispersed throughout them a catalyst comprising magnesium oxide and components from a Class C fly ash.

Abstract: Polymerization of siloxane is improved using a gypsum-based slurry that includes stucco, Class C fly ash, magnesium oxide and an emulsion of siloxane and water. This slurry is used in a method of making water-resistant gypsum articles that includes making an emulsion of siloxane and water, then combining the slurry with a dry mixture of stucco, magnesium oxide and Class C fly ash. The slurry is then shaped as desired and the stucco is allowed to set and the siloxane polymerizes. The resulting product is useful for making a water-resistant gypsum panel having a core that includes interwoven matrices of calcium sulfate dihydrate crystals and a silicone resin, where the interwoven matrices have dispersed throughout them a catalyst comprising magnesium oxide and components from a Class C fly ash.