The term "opening a house" traditionally refers to short-term rental in hotels, guest houses, hotels and some civil rental houses. For example, when communicating with guests, hotel service personnel usually say, "Do you need to open a room for you now?" "Check-in" here refers to check-in procedures. The lessor collects service fees for various services and consumption from check-in time to check-out. As a popular meaning recently, "check-in" is often used as an implicit way for lovers (same sex or opposite sex) or people who need to have sex to solve their needs in hotels, hotels, hotels and other places.
Second, KF
Abbreviations.
Key fields Key fields; Liverpool (British Isles Vehicle Registration Symbol); Kidney foundation; Kent foundation Kent foundation;
Third, KF
It is a salt, so it is also called fluoride salt of potassium. White monoclinic crystal or crystalline powder. It tastes salty. Easy to absorb moisture. Soluble in water, insoluble in ethanol. Its aqueous solution is alkaline and can corrode glass and porcelain. The relative density is 2.454. The melting point is 858℃. Moderate toxicity, median lethal dose (rats, oral) 245 mg/kg. Irritating.