If you are blending oils, you will need a dropper pipette for each raw oil you use.
如果需要混合精油，还需要一根滴管来吸取你要用的精油。
Esterification and transesterification are the most common methods of producing biodiesel. It is important to select an appropriate catalyst based on the properties of raw oil.
酯化及转酯化法是目前研究最多、最具优势的生物柴油制备方法，根据原料特性选择合适的催化剂是该法成功的重要保证。
Oil sludge is produced in the process of raw oil dehydrating in oil field corporations and oily sewage disposal in the petrochemical industry factories.
含油污泥主要产生于油田企业对原油脱水以及油田和炼油厂等石化行业的污水处理部门对含油污水的处理过程中。
The results of industrial standardization showed that the decrease of dry point of raw oil and space velocity was favourable to the decrease of olefine content in the solvent oil.
工业标定结果表明，降低原料油干点和操作空速对降低溶剂油产品烯烃含量有利。
The utility model can efficiently prevent air locking phenomena and the eccentric wear of the plunger, increase the production quantity of raw oil and extend the service life of the oil well pump.
本实用新型可有效地防止“气锁”和柱塞偏磨，提高原油产量和抽油泵的使用寿命。
The utility model can efficiently prevent air locking phenomena and the eccentric wear of the plunger, increase the production quantity of raw oil and extend the service life of the oil well pump.
本实用新型可有效地防止“气锁”和柱塞偏磨，提高原油产量和抽油泵的使用寿命。
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