大小头技术参数： SIZE | A | B | L | T | 1.5″×1.0″ | 38.1 | 25.4 | 50.8 | 1.65 | 2.0″×1.0″ | 50.8 | 25.4 | 50.8 | 1.65 | 2.5″×1.5″ | 50.8 | 38.1 | 101.6 | 1.65 | 2.5″×1.5″ | 63.5 | 38.1 | 50.8 | 1.65 | 2.5″×2.0″ | 63.5 | 50.8 | 152.4 | 1.65 | 3.0″×1.5″ | 76.2 | 38.1 | 101.6 | 1.65 | 3.0″×2.0″ | 76.2 | 50.8 | 50.8 | 1.65 | 3.0″×2.5″ | 76.2 | 63.5 | 254.0 | 2.10 | 4.0″×2.0″ | 101.6 | 50.8 | 203.2 | 2.10 | 4.0″×2.5″ | 101.6 | 63.5 | 152.4 | 2.10 | 4.0″×3.0″ | 101.6 | 76.2 | 101.6 | 2.10 |
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