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共享（shar 拆分（branch） 合并（merg 签出（checkout）
steel aluminum glass copper
pure metal bauxite gold liquid
The features of aluminum and its functions. The process of aluminum. The discovery of aluminum. The promising future of aluminum.
higher lower the same none of the above
倾听（Listento） 分担（Shar 澄清（Clarify） 陈述（Illustrat 要求（ask）
The metal has been first early
Aluminum is widely used in transportation. Aluminum is also used in many parts of airplanes. Aluminum is being used extensively in the building industry. Aluminum is not used in its pure form.
reduce the ring groove wear rate seal against crankcase vapors lessen the wear on aluminum part of the cylinder allow for the greater expansion rate of aluminum
lightweight, rustproof but not easily shaped into different forms heavyweight, rustproof and easily shaped into different forms lightweight, rustproof and easily shaped into different forms lightweight and easily shaped into different forms but it is easy to become rusty
twice as large as with a cast iron piston the same size as with a cast iron piston half as large as with a cast iron piston the same size as the crown of an aluminum piston
聚合组的类型是静态聚合 聚合组的类型是动态聚合 聚合组中包含了3个处于激活状态的端口 聚合组中没有处于激活状态的端口
倾听（Listento） 分担（Shar 澄清（Clarify） 陈述（Ilhustrat 要求（ask）
The features of aluminum and its functions. The process of aluminum. The discovery of aluminum. The promising future of aluminum.
wind solar energy hydraulic power electricity
"A" fire "B" fire "C" fire "D" fire
pure metal bauxite gold liquid
low-half, cast iron; top-half, heat-resistant steel low-half, aluminum; top-half, stainless steel piston skirt; cast iron; piston crown; heat-resistant steel piston skirt; aluminum; piston crown; stainless steel
Aluminum is widely used in transportation. Aluminum is also used in many parts of airplanes. Aluminum is being used extensively in the building industry. Aluminum is not used in its pure form.
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