正三通

Nominal	Socket Type
SIZE	d1	D	L1	L2	L
1/2"	19.3	28.0	16.3	27.2	54.4
3/4"	24.1	33.6	18.2	32.4	63.1
1"	31.0	42.4	21.1	37.4	74，0
1-1/4"	39.0	52.6	22.6	42.6	84.1
1-1/2"	49.0	66.0	25.2	50.1	101.5
2"	61.9	84.4	28.6	61.2	122.4
2-1/2"	73.6	95.8	32.5	69.8	138.2
3"	88.3	113.7	36.4	81.4	164.1
4"	107.9	138.4	41.9	97.2	193.8