The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）
The （）pump is usually used as the lubricating oil pump.
The amount of fuel delivered by a unit injector is controlled by the （）
Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.
When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）
The basic function of the centrifugal pump impeller is to （）.
A centrifugal pump vibrates excessively during operationUpon disassembling the pump it is found that the impeller is out of balanceWithout an available spare, you should （）.
Which pump is the self-priming pump?（）
The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.
A pump is said to have "negative suction head" when the pump is located （）.
The amount of fuel injection into a diesel engine cylinder by a unit injector, is controlled by（）
The injector pump is operated by a cam which drives the （） up and down.
The fuel injector pump is operated by （） which drives the plunger up and down.
It is known that the name of Peking opera is related to the birthplace of it.
The opera Flora Fidelis is going to open tomorrow at the Opera House.
_________is of utmost importance in the performance of Peking Opera, because first of all, Peking Opera is such kind of art.
The sheng is the female role in Peking opera.
The virtuality of Peking Opera consists of two aspects: one is virtual movements, and the other virtual settings.
Which play is not the representative play of Mei Lan Fang in Peking Opera?
Which one below is not the most typical characteristic of Chinese Peking Opera?
What is not one of the four basic skills of performance in traditional Chinese operas?
悉尼歌剧院全世界闻名.Sydney Opera House is __ all over the 悉尼歌剧院全世界闻名. Sydney Opera House is __ all over the __.
When the relief valve is used as a constant pressure valve, it is connected to the outlet of the hydraulic pump to ensure that the outlet pressure of the hydraulic system (pump) is constant.
京剧是中国最具代表性的传统戏曲，主要用胡琴和锣鼓等伴奏，被称为________ 。 Peking opera is the most representative traditional opera in China. It is mainly accompanied by instruments such as huqin and gongs and drums. Peking opera is called ________.
