| | 规格 | 内经 | 外经 | 卷/米 | | | | | | | US (inches) | (mm) | (mm) | (M/coil) | | 3/8" | 12.3 - 12.8 | 18.5 - 19.0 | 50 | | 1/2" | 15.7 - 16.3 | 21.8 - 22.3 | 50 | | 3/4" | 20.7 - 21.2 | 26.2 - 27.7 | 30 | | 1" | 26.2 - 26.8 | 33.8 - 34.4 | 30 | | 1-1/4" | 34.7 - 35.4 | 42.4 - 43.2 | 20 | | 1-1/2" | 40.0 - 40.6 | 48.4 - 49.3 | 20 | | 2" | 51.3 - 51.9 | 60.4 - 61.3 | 15 | | 2-1/2" | 62.9 - 63.6 | 73.1 - 74.0 | 10 | | 3" | 77.9 - 78.7 | 88.9 - 89.9 | 10 | | 4" | 101.6 - 102.6 | 114.3 - 115.3 | 5 |
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