Impugn
发表于 2025-3-26 22:24:32
Water, is usually an essential service. Obviously, pipes of adequate size must be used and gauges are needed for metering or measuring the flow. Open channels and gutters are also required to carry away rainwater, etc., and these must also be properly designed.
薄荷醇
发表于 2025-3-27 03:49:57
Applied Mechanics,igated quantitatively, and gives rise to certain important terms. The . experienced by the material, which depends on the size of the force operating, and the area over which it operates (figure 14.1) is given by the equation
mydriatic
发表于 2025-3-27 07:39:21
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Little
发表于 2025-3-27 12:01:11
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忘川河
发表于 2025-3-27 16:48:20
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seruting
发表于 2025-3-27 21:49:05
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Antimicrobial
发表于 2025-3-28 01:29:11
Heat Losses from Buildings,temperature above that of the outside environment. This means that because the house is at a higher temperature than its surroundings, it loses heat to the surroundings (figure 12.1). Unless the heat is replenished, the house will get cold, so more fuel is necessary to maintain a reasonable temperat
表主动
发表于 2025-3-28 05:34:33
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背叛者
发表于 2025-3-28 09:49:59
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注意
发表于 2025-3-28 12:20:52
Entstehung und Stabilisierung des Brennflecks in der Niederdruckentladung,ung. Die Kathode in der Niederdruckgasentladungslampe, deren thermische Emission ohne Entladung aus wirtschaftlichen Gründen gleich Null (Drossel-Starter-Schaltung) oder klein gegen den Entladungsstrom (Rapid-Start-Schaltung) ist, ist dagegen sehr viel weniger untersucht worden. So behandelt z. B. e