The calender and its revision are ancient problem of mathematics as well as one of mode of expressions as to national traditional culture.
历法及其修订，既是一个古老的数学问题，也是民族传统文化的表现形式之一。
An automatic blister pricking device for rubber calender is designed and installed to solve the rubberized cord overlap problem resulting from too many blisters in coating sheet during calendering.
为解决压延过程中因胶片含有过多气泡而产生的胶帘布压摞质量问题，设计安装了压延机自动划泡装置。
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