规定了一种测试方法，用于确定张力调节器给定位置处的针线张力变化。该方法适用于电动家用缝纫机，但也可能适用于手动或脚踏式缝纫机。除原理、材料和仪器、程序、结果表达和试验报告外，还包括一份规定棉线的附件。

Specifies a method of test for determining the variation of needle thread tension at given positions of the tension regulator. The method is applicable to motor-operated household sewing machines, but it may also be possible to apply it to hand- or treadle-operated machines. Includes additionally to principle, material and apparatus, procedure, expression of results and test report an annex which specifies the cotton thread.