| 摘要 |
<p>The sofa jack includes a base plate with wheels E, an outer case G having a pyramid shape, an air bag lifting mechanism F, a cylinder or jack chamber B inside the outer case G which stabilises up and down movement, a foot pump A pump connected to the air bag F, an air valve D to release air from the air bag F and a platform C which may project through a slot in the outer case G. The jack may be used to lift heavy furniture for cleaning. Two or more jacks may be used together.</p> |
