As amatter of fact, the burden flow released from bell did not move along thedesigned bell angle but along a slightly larger angle, and the centre of burdenflow was not at the half point of burden travel in bell but slightly lower.

• 实际料流在运动中离开钟面的角度不是大钟角度,而是要大些,料流的中心不在大钟行程的 1/2处,而是要稍低些。