7、A piston engine is said at best to be only 33% efficient.
11、motor cycle with or without side-cars with reciprocating internal combustion piston engine of a cylinder capacity exceeding 800cc
15、motor cycle and cycle fitted with an auxiliary motr with or without side-cars, with reciprocating internal combustion piston engine of a cylinder capacity exceeding 800cc
19、generating set, driven by internal combustion piston engines, direct current
1、rotary piston engine of trochoidal type
5、Research into the restoration method for high-altitude piston engine
10、Design of minitype aircraft piston engine counter weight inner bore mill fixture
16、The result shows that the traditional estimation methods about powerplant performance are adapted for propeller aircraft even if with small sized piston engine and propeller.
21、bus [with other than compression ignition internal combustion piston engines (diesel or semi diesel)]
4、Key technologies on monopropellant-powered hydraulic free piston engine
12、The counterweight of an aerial piston engine made in American is object of repair technology research in this paper.
18、generating set, driven by internal combustion piston engines alternating current
3、The principal type is the reciprocating-piston engine.
13、motor scooter with reciprocating internal combustion piston engine of a cylinder capacity exceeding 50cc but not exceeding 250cc
22、generating set, alternating current (excl. those driven by internal combustion piston engines)
9、motor cycle with or wiout side-cars other than with a reciprocating internal combustion piston engine
2、rotary piston engine of epitrochoid desig
17、Mainly used for aviation piston engines.
14、motor cycle with or without side-cars with reciprocating internal combustion piston engine of a cylinder capacity exceeding 50cc but not exceeding 250cc
20、It is also generally conceded that Wankel engines are quieter than comparable piston engines.
8、motor scooter other than with a reciprocating internal combustion piston engine
6、The expansion engine which has a inlet valve without exhaust valve, is a short piston engine.
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