plant disease pyramid 病害四面体
The yield structure of the plant showed a pyramid shape.
群落主要植物种群的产量结构呈金字塔型。
Samples of blended coal ash were taken from the boiler of a power plant 700mw unit. Their softening temperature was measured by a pyramid method on an intelligent ash-melting point measuring device.
从某电厂700 MW机组锅炉取混煤灰样，在智能灰熔点测定仪上采用角锥法对其进行软化温度测定。
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