坚实的铝合金活塞强，重量轻。
过共晶铝合金活塞的尺寸稳定性高于共晶铝合金活塞；
The dimension stability of hyper eutectic Al Si alloy piston is higher than that of eutectic Al Si alloy piston.
本实用新型不但能铸造铝合金活塞，还能铸造气缸、轴承壳或类似薄壁件。
The utility model not only can cast aluminum alloy pistons, but also can cast air cylinders, bearing housings or similar thin-wall parts.
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