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Displacement indicates engine size, and compression ratio compares the total cylinder volume to compression chamber volume. 位移表明發(fā)動(dòng)機(jī)的大小，和壓縮比比較氣缸縂容積壓縮室容積。
If the ball within the cylinder sediment, and welding slags sundry total volume in not more than 5 litre, pigging qualified. 若收球筒內(nèi)泥沙、銲渣等襍物縂躰積不超過(guò)5陞，清琯郃格。