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| 型 號 | 火 探 管 長 度 | 單 位 (直徑x高度) | 保 護 容 積 |
| FT25A | 10 FT (3.05M) | 3.0”x15.25” (78mmx343mm) | 25 FT³ (0.7M³) |
| FT50A | 10 FT (3.05M) | 3.1”x20.50” (78mmx432mm) | 50 FT³ (1.4M³) |
| FT75A | 10 FT (3.05M) | 3.5”x21.50” (89mmx432mm) | 75 FT³ (2.1M³) |
| FT100A | 15 FT (4.57 M) | 4.1”x21.0” (104mmx432mm) | 100 FT³ (2.8M³) |
| FT125A | 15 FT (4.57 M) | 5.1”x23.0” (130mmx457mm) | 125 FT³ (3.5M³) |
| FT150A | 15 FT (4.57 M) | 5.1”x23.0” (130mmx457mm) | 150 FT³ (4.2M³) |
