The test on the(influence) of changing fuel supply advance angle on fuel economy was carried out on single cylinder diesel engine separately using diesel fuel and ethanol-diesel blend fuel.
在单缸柴油机上分别使用纯柴油和乙醇柴油混合燃料，进行了改变供油提前角对发动机燃料经济性影响的试验。
In the use process of the gas cylinder, if find any serious corrosion and damage or have doubts about its security, should be tested in advance.
气瓶在使用过程中，发现有严重腐蚀、损伤或对其安全性有怀疑时，应提前进行检验。
In the use process of the gas cylinder, if find any serious corrosion and damage or have doubts about its security, should be tested in advance.
气瓶在使用过程中，发现有严重腐蚀、损伤或对其安全性有怀疑时，应提前进行检验。
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