论文部分内容阅读
1.横断尺的构造:它的尺身是用一块方木,由当中凿一凹槽(如图),用一块薄木板钉于凹槽上,然后照图把凹槽部份的薄板刨去一部份,形成乙一乙剖面的形状,两端照图制造,装上一个滑轮。 2.矩形板:是用短木板一块长约40公分,宽约3公分,照上述凹槽,将矩形板一端订一丁头板,把丁头板放入槽内,矩形板伸于槽外,尺两端钉上滑轮,这样就构成了横断尺的全部构造,刻上分划,将布尺订于矩形板上即可使用(尺身最好设水平管一个,如买不到水平管则可设置垂球一个)。
1. The structure of a cross ruler: Its ruler is made of a piece of square wood, from which a groove is cut (as shown in the picture), a thin wooden board is nailed to the groove, and then the thin part of the groove is planed Part of the shape of the B-1 profile, both ends of the photo production, fitted with a pulley. 2. Rectangular plate: short piece of wood is about 40 cm long, about 3 cm wide, according to the above groove, the rectangular plate at one end of a Ding head plate, the head plate into the tank, the rectangular plate extends outside the tank , Feet on both ends of the nail on the pulley, thus forming the entire cross-sectional structure, engraved on the division, the cloth ruler set on the rectangular plate can be used (the best rule set a horizontal tube, such as the level of the tube can not buy You can set the ball down one).