Scroll technology replaced conventional piston compressor technology as the industry standard.

涡旋压缩技术取代传统的活塞压缩技术成为新的行业标准。

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Alloy ZL108 is a main brand of cast aluminum alloy used for power engine piston material, it is not needed to contain titanium according to the national standard now.

ZL 108合金是目前国内发动机活塞材料使用的一种主要铸造铝合金牌号，我国现行标准中zl108并不含钛。

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Piston: Single piece, stainless steel design, corrosion resistant with magnetic sensing band standard all sizes.

活塞：单件，不锈钢设计，抗腐蚀与磁感应带标准的各种规模的抵抗。

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Makers of fixed-wing aircraft are also looking at diesel engines, in small planes at least, where they show promise as a serious alternative to standard piston engines, which run on a high-octane form of petrol.

ECONOMIST: Monitor