這臺(tái)發(fā)動(dòng)機(jī)類似目前的單作用煤氣和重油發(fā)動(dòng)機(jī).This engine resembled present single - acting gas and oil engines.重油報(bào)價(jià)為每桶17美元.The heavy oil was quoted at $ 17 per barrel.這種重油會(huì)妨礙機(jī)器的運(yùn)轉(zhuǎn).That heavy oil will clog up the machinery, ie prevent it from w...