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    公稱通徑 |外徑 |中心至端面 | Nminal Diameter|Outside Diameter|Center T end| Mm|In|D1×D2|C|M| 20×20|3/4×3/4|25×25 26.7×26.7|29|29| 20×15|3/4×1/2|25×20 26.7×21.3|29|29| 25×25|1×1|32×32 33.4×33.4|38|38| 25×20|1×3/4|32×25 33.4×26.7|38|38| 32×32|1.1/4×1.1/4|38×38 42.2×42.2|48|48| 32×35|1.1/4×1|38×32 42.2×33.4|48|48| 40×40|1.1/2×1.1/2|45×45 48.3×48.3|57|57| 40×25|1.1/2×1|45×32 48.3×33.4|57|57| 50×50|2×2|57×57 60.3×60.3|64|64| 50×25|2×1|57×32

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