| 摘要 |
A measurement or marking tool such as a roofer's square having a right triangular configuration'including a first straight edge having an abutment ledge therealong'a second straight edge extending at a right angle to the first straight edge, and a third straight edge forming the hypotenuse extending between the first and second straight edges'a linear measurement scale along the second straight edge and a diamond shaped aperture adjacent to the second straight edge located at a distance of three and a half inches from the intersection of the first and second straight edges'having a configuration and dimension to snugly receive the elongated lead point of a carpenter's pencil in such diamond shaped aperture to mark on a work piece such as a piece of lumber on which the tool or roofer's square is placed. The measurement and marking tool also includes an elongated aperture having elongated beveled side edges with measurement markings therealong'and a triangular aperture whose hypotenuse is substantially parallel to the elongated aperture and whose first and second sides forming a right angle are substantially parallel to respective ones of the first and second sides of the measurement and marking tool itself which form a right angle. The side edge of the triangular aperture which is parallel to the second side edge of the tool itself includes a plurality of notches. The side edge of the triangular aperture which is parallel to the first side edge of the tool itself is beveled. the first side edge of the
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