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The chemical speciation of elemental sulfur impacted by various SOB was very poorly investigated, further research may provide theoretical support to the elucidation of sulfur metabolism of acidophilic SOB.

有关嗜酸硫氧化细菌作用下硫的形态研究十分缺乏,进一步开展嗜酸硫氧化细菌作用下元素硫化学形态的研究可以为这类细菌的硫氧化机制及对硫化矿的浸出机理的阐明提供理论依据。

Armed with this information and further analyses, Rumble, lead author Bekker, and colleagues propose the following scenario today in Science . Early in Earth's history, volcanic eruptions spewed massive amounts of sulfur dioxide into the atmosphere, where UV sunlight broke down the gas and created the odd sulfur isotope ratios. The sulfur descended with the rain and accumulated into sedimentary beds on the sea floor. Once there, superheated water from geothermal vents at various locations on the sea floor cooked the sulfur into sulfide. Finally, nickel-bearing magma welled up from Earth's mantle, combining with the sulfide to form nickel sulfide and encasing the compound inside volcanic rock called komatiite.

凭借这份资料和进一步的分析,朗布尔、研究论文的第一作者贝克及同事们今天在《科学》杂志上提出了如下的推测:在地球早期的历史上,火山爆发将大量的二氧化硫气体喷射到空中,太阳的紫外线将其分解,产生了奇特的硫同位素比值,这种硫随雨降下,积存于海底沉积层中;一旦到达海底,海底各处的地热出口所产生的温度过高的水把硫加热成硫化物;最终含有镍的岩浆从地幔中涌出,跟硫化物结合形成硫化镍,并将硫化镍包裹在一种叫做"科马提岩"的火山岩中。

From the strength of the cylinder in the platen press ,the relations between the allowable stress of material to make the cylinder and the hydraulic pressure are derived when the outer diameter of the cylinder is the minimal value.

根据平板硫化机液压缸圆筒部分的强度条件,推导出液压缸外径为极小值时,液压缸材料的许用应力与工作液压力之间的关系,从而为平板硫化机的优化设计提供了最佳工作液压力值。

The process conditions were optimized by orthogonal test, and discomposed temperature of sulfiding agent was evaluated by means of TPR apparatus.

同时通过正交试验对硫化剂的制备条件进行了优化,并采用TPR装置评价了硫化剂的分解温度。

It was discussed that the main factors having effect on the vulcanization time of RTV block methyl silicone rubber, such as the mol ratio of ethoxyl and silicone hydroxyl, the pH value of methyltriethoxysilane, and the content of iron ions impurity in methyltriethoxysilane, temperature, moisture, and the quantity of catalyst.

讨论了影响甲基嵌段室温硫化硅橡胶硫化时间的主要因素,如:乙氧基与硅羟基的量之比,甲基三乙氧基硅烷低聚物的pH值、铁离子的含量,以及温度、湿度和催化剂的用量等;并介绍了预防和控制这些影响因素的方法。

The best method increasing the production efficiency of the platen press was to reduce its auxiliary operating time, that is ,the time for the rise and decline of the bolster, and the time for opening and closing molds.

提高平板硫化机生产效率,最有效的方法还应是快速硫化,减少平板硫化机辅助操作时间,即可动平台上升、下降时间和开模、合模时间。

Factory is located in northern China's largest rubber seal production and export base, Xingtai City North Industrial Park is scheduled, the company has imported from Japan, Taiwan, introduced a first-class automatic pumping capacity vulcanizer really, since the inverted plate vulcanizer and automatic trimming machine and other production equipment, electronic tensile machine, oil seal testing machine desktops, projectors, vulcanizing device, door tail came Instrument, analysis days equal a full set of advanced precision inspection equipment to ensure product quality in the peer leadership .

工厂地处中国北方最大的橡胶密封件生产出口基地,邢台市北定工业园区,公司先后从日本、台湾等地引进了一流的自动抽真容硫化机、自翻平板硫化机和自动修边机等生产设备,电子拉力机、油封台式实验机、投影仪、硫化仪、门尾拈度仪、分析天平等全套先进的精密质检设备,从而保证了产品质量在同行中的领先地位。

Analyzed the basic state of the mold s and capsules matched with the tire curing press, as well as some technical progress and technical characteristics of the tire curing press, and .

总结分析了与轮胎硫化机配套的模具和胶囊的基本情况以及轮胎硫化机的一些技术进步和技术特点,对轮胎硫化机今后的发展作了展望。

Analyzed the basic state of the molds and capsule s matched with the tire curing press, as well as some technical progress and technical characteristics of the tire curing press, and .

总结分析了与轮胎硫化机配套的模具和胶囊的基本情况以及轮胎硫化机的一些技术进步和技术特点,对轮胎硫化机今后的发展作了展望。

Brief introduced the development course of tire curing press , analyzed the production status of tire curing press , and introduced the current main production countries and regions for curing press, as well as major manufacturers.

简述了轮胎硫化机的发展历程,分析了轮胎硫化机的生产现状,介绍了目前主要生产硫化机的国家和地区,以及主要的生产厂家。

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