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为金属制品和电缆行业设计的拉丝、钢绳、绞缆计算尺,已由上海计算尺厂制成问世.该尺可做40项专业计算和通用计算,系综合性多功能计算工具.尺上储刻大量有关计算参数,可供各品种、结构、规格钢绳和电缆的计算.应用该尺不需记忆公式,不必查阅中间参数,能一举读出结果.读数均标定位和因次,容易掌握,便于普及.该尺正面可计算钢、铜、铝丝的单位长、单位重、总压缩率、拉拔道次、一次压缩率、作业率、理论和实际产量等17项(见正面用法举例).又可做锌、锡、黄铜等镀层计算,包括镀层重量、厚度和镀层金属附着量换算等6项.背面做钢绳和绞缆计算共17项,包括各规格工字轮上丝、股、绳的容长和容重;32种结构点线接触钢绳和钢帘线的股或绳以及各种丝数、
For the metal products and the cable industry designed wire drawing, steel wire, cable computing ruler, has been made by the Shanghai calculation rule plant. The ruler can do 40 professional computing and general computing, is a comprehensive multi-function computing tools. Storing a large number of relevant calculation parameters, for various varieties, structures, specifications steel rope and cable calculation. The use of the ruler does not need to remember the formula, do not have to consult the intermediate parameters, can read the results in one fell swoop. Mastered, easy to populace. The front of the ruler can calculate the unit length of steel, copper and aluminum wire, unit weight, total compression ratio, drawing pass, a compression rate, operating rate, theoretical and actual output 17 For example) .Also can do zinc, tin, brass and other coating calculation, including the coating weight, thickness and coating metal adhesion conversion 6. Back of steel rope and cable calculation of a total of 17, including the specifications on the word round Wire, strand, rope capacity and bulk density; 32 kinds of structure point line contact with the steel cord and steel cord or rope and a variety of wire,