| http://www.w3.org/ns/prov#value | - Professional design, maximum accuracy, different levels of sensitivity from normal to very high, it suits any types of your needs, such as: hanging pictures, carpenter work, brick layer or building construction.Features - 3D simulated plumb - Support multiple angle units: degree, radian and gradian - Easy and quick calibration function - Magnify the level reading by supporting different sensitivit
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