The main obstacle in biodiesel application is from the production cost, especially in the raw material supply and complex production processes.
目前制约生物柴油商业化大批量生产的瓶颈问题是其生产成本高，包括原料成本高，制备工艺路线复杂。
In the last section of the thesis, the application software of raw material supply management system is developed by using Object Oriented methods.
本文最后利用面向对象方法开发原料管理系统应用软件。
The questions of insufficient forest resources and inferior quality exacerbates the contradiction between raw material supply and demand in the country wood industry.
由于我国森林资源总量不足和质量不高等问题，木材工业中原料供需之间的矛盾日益加剧。
At present, the formation of fused silica from raw material supply to production, processing and sales, with annual output of 10,000 tons per year production line of fused silica.
目前，已形成从原材料供应到熔融石英生产、加工、销售为一体的，具有年产10000吨规模的熔融石英生产线。
For reasons of raw material supply, types of phosphate ores, and production management, a number of enterprises are unable to keep up operation, and their economic benefit is poor.
由于原料供应、磷矿种类和生产管理上的原因，有不少企业不能持续运转，经济效益不佳。
However, owing to the shortage of raw material supply, lack of supportive policies, as well as issues such as lack of sales channels, bio-diesel industry in China is being confronted with dilemma.
由于原料供给不足、扶持政策缺位以及销售渠道匮乏等问题，我国的生物柴油产业目前陷入了困境。
However, owing to the shortage of raw material supply, lack of supportive policies, as well as issues such as lack of sales channels, bio-diesel industry in China is being confronted with dilemma.
由于原料供给不足、扶持政策缺位以及销售渠道匮乏等问题，我国的生物柴油产业目前陷入了困境。
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