| 摘要 |
A cutting tool for cutting sheets of materials, such as, for example, sheets of building materials. The cutting tool includes a base, a support connected to the base and a cam with an increasing radius is positioned over a portion of the base and pivotally connected to the support. The cutting tool further includes a blade holder and blade which are engaged with the cam and positioned over the base. The blade holder and the blade are moveable between an open position and a closed position or cutting position by pivoting the cam.
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