Secant blade lift, swing all by the handle adjustment, simple and efficient.
割线锯片升降，摆动全部由手柄调节，简便高效。
2
According to microstructure and the results of hardness test, appropriate adjustment of heat treatment could promote fatigue lift of spring steel.
根据显微组织和硬度检测结果，适当调整热处理工艺，可进一步提高弹簧的疲劳寿命。
3
The utility model is characterized in that the lift is convenient, left and right adjustment is convenient, and the utility model is firm, durable and popular.