真密度 3.07
52.870.4
70.4140.8
88211.2 105.6281.6
123.2316.8
140.8387.2
158.4422.4
176457.6
193.6528
211.2
228.8
246.4
264
281.6
299.2
316.8
334.4
352
369.6
387.2
404.8
422.4
440
457.6
475.2
492.8
510.4
528
545.6
563.2
580.8
598.4
616
633.6
651.2
668.8
686.4
704