首先在T-bar的垂直管件的右側上、下二端測量，再換至左側上、下二端測

首先在T-bar的垂直管件的右側上、下二端測量，再換至左側上、下二端測量。

結果 (英文) 1:

First, measure the upper and lower ends of the right side of the T-bar vertical pipe, and then change to the upper and lower ends of the left side to measure.

結果 (英文) 2:

First measure on the right side and lower end of the vertical tringe of T-bar, then change to the upper and lower ends of the T-bar.

結果 (英文) 3:

First, measure at the right upper and lower ends of the vertical pipe of T-bar, and then change to the left upper and lower ends.