波音公司：预计4月份737飞机交付量将达到20-30架区间的高端。

Core Viewpoint - Boeing expects the delivery of 20-30 units of the 737 aircraft in April, leaning towards the higher end of this range [1] Group 1 - The anticipated delivery range for April is between 20 to 30 aircraft [1] - Boeing is optimistic about reaching the higher end of the delivery range [1]