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Advance Member
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其實那一段是提到成份的部份, 原文如下:
GROS HEATING VALUE
The LNG shall have, in a gaseous state, a Gross Heating value of not less than 1.070 BTU's per standard cubic Foot and not more thatn 1.170 BTU's per Standard cubic Foot.
COMPONENTS
The LNG should contain not less than eighty-five molecular percentage (85 mol%) of methane (CH4) and, for the components and substances listed below, such LNG shall not contain more than the following:
(a) Nitrogen (N2), 1.0 mol%
(b) Butanes (C4) and heavier, 2.00 mol%
(c) Pentanes (C5) and heavier, 0.10 mol%
(d) Hydrogen Sulfide (H2G), 0.25 grains per 100 standard cubic feet (0.25 grains/100 scf)
(e) Total sulfur content, 1.3 grains per 100 standard cubic feet (1.3 grains/100 scf)
我有幾個問題:
1. BTU 怎麼翻比較好?
2. 句子裏的 heavier 應該如何解釋?
3. 到底是用 feet 還是 foot ?
感謝指教...!!
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