"RV", also known as Recreational Vehicle, also translated as Motorhome or Trailer, referred to as RV, can be docked away from the city's beaches, lakeshore, grass, Wash a hot bath, sleep soft and comfortable bed, watch TV, listen to music, put DVD and so on.In China, most of companies choose to use 4 linear actuators like our GRA-D8 series to lift/down their tents, some of them use tubular inline linear actuators like our L50 series. But in Australia, Canader and America, they more likely to use tubular models.Usually, in RV campers, people also need motorized bed/ desk, window, which needs smaller tubular actuators too.