定中心杠杆表，用于确定工件内，外中心与机床主轴中心的相对位置。它具有当心轴旋转，指示器总是面对操作者的特点。其技术要求执行企业标准Q/HLR19-2002。

　　The centering dial test indicators are used for determining the positions of centres of inside and outside cylindrical surfaces of workpieces in relation to the centre of spindle of the machine tool.Tt has the feature that the indicator always faces the operator while the spindle is rotating,It's technical reguirement is in accordance with the enterprise standard Q/HLR 19-2002.