棱镜角规和棱镜轮尺,在国外已有一二十年的历史,但我国尚未在生产上应用。遵照毛主席关于“中国应该大量吸收外国的进步文化,作为自己文化食粮的原料”的教导,现就我们的学习体会和对棱镜角规的初步试用,作如下介绍。 Prism prism and prism caliper, has a history of one or two decades abroad, but our country has not yet been applied in production. Following Chairman Mao’s teaching on “China should absorb a large part of the foreign progressive culture as a raw material for its own culture and food,” we present the following about our learning experience and the preliminary trial of the prism angle.