Now I replace this object by mass m2 but the extension is the same, so the pull must be same the spring doesn't know what the mass is at the other end, right?
再以质量m2的物体做同一个实验2，弹簧伸长相同，可知拉力相同，这与悬挂物体的质量，无关？
Mass customization is a kind of new production way, it must replace a large quantity of production of 20th century, becomes the production way of main stream of the industry of 21st century.
面向大规模定制的生产方式是一种新型的生产方式，它必将取代20世纪大批量生产，成为21世纪工业的主流生产方式。
On the basis of exploration and demonstration, SBSD bulk setter and mass flowmeter was combined to replace the oval gear setters.
在考察、论证的基础上，用SBSD批量给定器和质量流量计配套使用来代替椭圆齿轮设定器。
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