1. Puts forward the data generation of attribute lower limit value and attribute upper limit value, gives the data generation model of attribute lower limit value, attribute upper limit value; 给出属性下界值，属性上界值的数据生成概念，给出属性下界值的数据生成模型，属性上界值的数据生成模型；
2. And loosen nuts on limit cam by spanner, rotating cam limit (yellow open, red off) to adjust to just push down limit switch (CLS) position, and then screw limit cam nut. 然后，用扳手松开限位凸轮固紧螺母，转动限位凸轮（黄色开，红色关）将其调整到恰好压下限位开关（CLS）的位置，再将限位凸轮螺母固紧。
3. And loosen nuts on limit cam by spanner, rotating cam limit (yellow open, red off) to adjust to just push down limit switch (CLS) position, and then screw limit cam nut. 然后，用扳手松开限位凸轮固紧螺母，转动限位凸轮（黄色开，红色关）将其调整到恰好压下限位开关（CLS）的位置，再将限位凸轮螺母固紧。
4. A combination of two limit checks, one of which applies to an upper limit, and the other to a lower limit. 两种限制性检查的结合，其中一种是对上限的检查，另一种则是对下限的检查。
5. Definition of limit, bounded monotonic sequence must possess a limit, and Cauchy's Convergence Principle (CCP) are fundamentals to the existence of limit. 而极限的定义、单调有界数列必有极限、柯西收敛准则是极限存在性的重要依据。
