问题
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Exhaust pipes for separate diesel engines can be combined only when ________.
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Where tanks are arranged for either oil or ballast __ must be fitted in the pipe so that only the ballast main or the oil transfer main connected to the tank..
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Operating a diesel engine under light loads and at low temperatures for an exhaust for an
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Large pipes or _____ are fitted between the steam and water drums to ensure good natural c
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Allowances may be made for the expansion and contraction in piping by the use of expansion
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Whats the main reason for the decline of Asian elephants?A.Their taming for circuses and z