矩——這件木工最重要的工具,是中國古代勞動人民的卓越發明和创造。 從山東嘉祥縣漢武梁祠的石像(引李儼“中國算學史”),長沙最近出土的楚鏡花紋(引陸懋德:“長沙出土的楚鏡研究”一文,載在1955年11月4日光明日報)、和中國最古的數學書“周髀算經”中關於矩的描寫各方面歸納看來,古矩的形象大致與今天木工所用的相同,好像引號(?),由長短二直尺(臂)直交拼插而成,長臂可叫做股,短臂可叫做勾;勾上有刻度,用以測量距離,至於石像中勾股間的弧狀連接(?)似為固定用;有人說:“古矩就是三角 Moments - The most important tool of this carpentry is the remarkable invention and creation of the working people in ancient China. From the stone statue of Han Wuliang in Jiaxiang County, Shandong Province (quoting Li Yin’s “The History of Chinese Studies”), the most recently unearthed image of Chu Jingchen in Changsha (quoted by Lu Xide: “The Study of Chu Mirror Unearthed in Changsha”, published in November 4, 1955 The Sunlight Daily newspaper) and the description of moments in the most ancient mathematical book, the Zhouyi Classics, concluded that the image of ancient moments is roughly the same as that used by today’s carpenters. It looks like quotation marks (?), from the length two. Straightedges (arms) are straightforward and intercalated. Long arms can be called strands, and short arms can be called hooks. There are scales on the hooks to measure the distance. As for the arched connection between the pygmatrices in the stone statues, it seems to be fixed; Someone said: "The ancient moment is the triangle