数显语音回弹仪符合标准技术参数：

1、指针长度：20.0±0.2(mm)                       

2、指针摩擦力：0.65±0.15(N)

3、弹击杆端部球面半径：25±1.0(mm)               

4、弹击拉簧刚度：785.0±40.0(N/m)

5、弹击锤脱钩位置：刻度线“100”刻线处             

6、弹击拉簧工作长度：61.5.0±0.3(mm)

7、弹击锤冲击长度 ：75±0.3                       

8、弹击锤起跳位置：刻度尺“0”处

9、钢砧率定值：80±2（我厂出厂产品控制在80-81之间）

数显语音回弹仪符合标准售后服务承诺书

After-sales service commitment

尊敬的用户您好：

Esteemed Customers

非常感谢您选用献县鹏翼建筑仪器厂产品，营业执照注册号：92130929MA0936YT18我们将尽心尽力地为您作好售后服务。为了让您能得到快速、满意的服务，我厂本着“诚信经营，稳步发展，与时俱进”的经营理念和以诚信服务营造客户放心选择的服务宗旨，现作出并实行如下承诺：

Thank you very much for choosing the products of Xian County Pengyi construction instrument factory, business license registration number: 92130929MA0936YT18, we will do our best for you after-sales service. In order to provide you with fast ａnd satisfactory service, our factory is in line with the business philosophy of "operating in good faith, steadily developing, keeping pace with the times" ａnd the service tenet of building customers with good faith, we are now making ａnd implementing the following commitments