如果在0～150mm游标卡尺的直尺下端增加一个测深量脚附件(见图1),可以提高测深精度,扩大其应用范围,使测量更加方便。图2为应用示例,图中,H=h+D/z,H为 If the 0 ~ 150mm vernier caliper at the bottom of the ruler to add a foot measuring accessories (see Figure 1), you can improve sounding accuracy and expand its scope of application, making the measurement more convenient. Figure 2 shows an example of application where H = h + D / z and H is