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询购	下载	查看	尺寸
询购	下载	查看	d in	D	B	C	d₁ ～
			3/4	47	31	14	28.2
			1	52	34.1	15	33.7
			1 3/16	62	38.1	18	39.7
			1 1/4	72	42.9	19	46.1
			1 7/16	72	42.9	19	46.1
			1 1/2	80	49.2	21	51.8
			1 11/16	85	49.2	22	56.8
			1 3/4	85	49.2	22	56.8
			1 15/16	90	51.6	22	62.5
			2	100	55.6	25	69.1
			2 3/16	100	55.6	25	69.1
			2 7/16	110	65.1	26	75.6