Based on the principle of ester hydrolyzation to ether in alkali condition, the process for preparation of dimethyl sulfide from sodium methyl sulfate residue was investigated.
根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚的方法。
Most of the large canopy culture is done all the year round, the airtight condition is good, the residue question of the agriculture chemical in the soil is more obvious.
大棚栽培多数是长年连作，密闭条件好，土壤中农药的残留问题就更加明显。
It(?) proven that this method improves the balancing grade of high speed centrifuge, and decreases the residue unbalance of rotor. Therefore the working condition of rotor is steadily and dependable.
实际运行证明，立式双校正面平衡方法不仅改善了高速离心机及呈悬臂支承结构的转子的平衡质量，而且使转子的不平衡残余值明显降低，平衡状态稳定可靠。
The technological process of recovering copper and bismuth in wet handling elution residue by adding pyrolusite as oxidizing agents under the condition of ordinary pressure, low temperature, acidity.
主要介绍在常压、低温、酸性条件下加软锰矿为氧化剂湿法处理洗净残渣提取铜和铋的技术。
Under the experimental condition, one third volatile was yielded during pyrolysis of black liquor solids from wheat straw pulping in the fixed bed pyrolysis apparatus, and other was solid residue.
实验条件下，麦草浆黑液固形物固定床热解后约三分之一转化为挥发分，余下为固体残渣。
Marsh gas it is composed mainly of methane which is naturally decomposed from the residue of plants under the condition of air isolation, marsh gas is used mainly as fuel.
沼气，主要成分为甲烷，由植物残体在与空气隔绝的条件下经自然分解而成，沼气主要作燃料。
Marsh gas it is composed mainly of methane which is naturally decomposed from the residue of plants under the condition of air isolation, marsh gas is used mainly as fuel.
沼气，主要成分为甲烷，由植物残体在与空气隔绝的条件下经自然分解而成，沼气主要作燃料。
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