| 1 |
sand filter |
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砂濾過器 |
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| 2 |
biological sand filter |
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生物学的砂濾過 |
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| 3 |
filter sand |
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こし砂 |
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| 4 |
fine sand filter |
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砕砂濾過器 |
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| 5 |
gravity sand filter |
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重力式砂濾過法 |
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| 6 |
pressure type sand filter |
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圧力式砂濾過法 |
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| 7 |
purification mechanism of sand filter |
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砂濾過の浄水作用 |
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| 8 |
rapid sand filter |
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急速濾過池 |
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| 9 |
rapid sand filter rating |
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急速砂濾過速度 |
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| 10 |
rapid sand filter speed |
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急速砂濾過速度 |
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| 11 |
rapid-sand-filter process |
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|
急速砂濾過法 |
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| 12 |
slow sand filter |
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|
緩速濾過池 |
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