universal bar

To establish single coal distribution curve, mixing coal fit curve equation and determination method of initialized parameter with roll bar have the universal meaning, It also can be acted as a successful reference fro determining some parameters to be defined from experimental data in group 1.

建立的单煤分布曲线方程、混煤拟合曲线方程和用滚动棒确定参数初值的方法具有普遍意义，由1组实验数据确定多个待定参数的场合可以借鉴。

互联网摘选

The Universal Product Code symbol, also known as the ‘ bar code ’, is printed on products for sale and contains information that a computer can read.

通用产品代码符号，亦称“条形码”，印在出售的商品上，其中含有计算机能识别的信息。

《牛津高阶英汉双解词典》