| 摘要 |
A level includes a plate secured to a casing and rotatable relative to the casing between a closed and an open positions. A bubble vial is attached to the plate. The plate has one or more catches for openably securing the plate to the casing. The casing includes one or more retainers for retaining the plate at the open position relative to the casing. A level housing has a chamber for receiving the casing, and the casing has one or more latched engageable with the level housing. The bubble vial preferably includes a cylindrical shape having a flat upper surface.
|
