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Speleology

Speleology (also spelled spelæology or spelaeology) is the scientific study of caves and other karst features, their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology). The term speleology is also sometimes applied to the recreational activity of exploring caves, but this is more properly known as caving, spelunking or potholing. Speleology and caving are often connected, as the physical skills required for in situ study are the same. Speleology is a cross-disciplinary field that combines the knowledge of chemistry, biology, geology, physics, meteorology and cartography to develop portraits of caves as complex, evolving systems.

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煤推

Transportation; Railway

蒸汽動力裝置是一些較大的英國機車上 LMSR 這次裝入後面的投標煤空間和以協助與煤對能夠達成的消防隊員的駕駛室向前移動。這是從駕駛室控制,行事的振盪和因此振動向前的煤。通常,消防隊員將不得不到到達不了的機車運動的結果向前動搖任何煤招標上。 ...

煤滑軌

Transportation; Railway

投標方面允許煤堆疊在標書上更高的床板的擴展。

煤階段

Transportation; Railway

這樣就可以產生煤炭的列車,允許他們排放入機車招標周圍的軌道級以上提出的特別軌道。

複利

Transportation; Railway

使用的蒸汽兩次、 一次在高壓缸,然後在低壓缸。請參閱複合 引擎。

coned 的鍋爐

Transportation; Railway

請參閱圓錐的鍋爐。

易燃和可燃液體

Fire safety; Prevention & protection

可燃液體或須須包括任何液體閃點低於 100 ° F (37。8 ° C),有蒸氣壓力不超過 40 psi (276 kPa) (絕對值) 在 100 ° F (37。8 ° C)。易燃液體須細分如下: I 類液體須包括那些有閃光點下方 100 ° F (37。8 ° C),並須細分如下: (1) IA 級液體須包括那些有閃光點下麵 73 ° F (22。8 ...

B 組

Fire safety; Prevention & protection

可燃氣體、 可燃液體產生蒸汽,或可燃液體產生蒸氣與空氣可能燃燒或爆炸,有任一最大試驗安全間隙 (MESG) 小於或等於為 0 混合。45 毫米或最小點燃電流比 (MIC 比) 較少或等於 0。40。 注: 典型的一類,B ...

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