Aiming at the actuality that the instrument used to mensurate the permeability of plastic film depends on import, this paper introduces the design of the mensurate system.
针对国内塑料薄膜透气率测定仪器依赖进口的现状，设计本系统。
The effect of temperature-increasing and insulation of water-permeability plastic film mulching was superior to the common plastic film mulching's in sorghum growing prior season.
渗水地膜覆盖加速了有效养分的转化，其生长发育吸收的土壤营养大于普通地膜覆盖和露地。
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