Hang the plumb on the shaft piano wire to measure the two distances which are between center line and the two edges of the M/E seat of the Fr 27#, Fr 33# and Fr37# respectively.

• 用在钢丝线上挂线锤的方法，记录27%23、33%23、37%23三档肋位处轴线对主机机座的分中数据。