| 摘要 |
A spirit level has a body member containing a leveling tube, in which the base of the body member has a width greater than the width of the body member in any other plane parallel with the base. Preferably the body member is triangular in cross section and may include three elongate wing or flange members extending radially from a central hub region. The body member may have axially-extending, for example telescopic, end members.
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