去年纽约州的锡拉丘兹市和康涅狄格州首府哈特福德市做了一项试验,让警察连续两周发出大量的法庭传票,使得两地边开车边使用手机的行为大幅减少。
Syracuse, New York, and Hartford, Connecticut, last year tried an experiment in which cops issued dramatically more citations for two weeks and mobile-phone use fell sharply in both places.
做此试验必须在通风良好处,并戴手套,面具以防水蒸气及锡焊剂烫伤。
Do this test must be in a well-ventilated place, and to wear gloves, masks in case of water vapor and tin flux burns.
研究了锡基轴承合金中铅的分析方法,试验结果表明该方法准确度高,并且测定铅含量的范围大。
The analysis method for lead in tin-base bearing alloy is studied. It is showed from the test that it has high accuracy and wide measure range.
对传统的格利雅法合成四丁基锡工艺进行了改进,并报道了其半工业试验的效果。
Improvement on the Grignard method is made and the semi industry experiments are reported.
对低锡青铜进行了吹氧精炼试验。
The tests of refining by oxygen blow were made on melting low tin bronze.
在此基础上,我们对几种卤化物作了比较试验,发现加入溴化钠对测定锡的灵敏度最高。
On the basis of this, from the comparative experiments of several halogenides, we have found that the addition of sodium bromate has the highest sensitivity effect in the determination of tin.
在大量试验的基础上,整定出两条锡点炉炉温程序控制设定温度曲线。
Based on the experiments, two temperature setting curves of tin freezing point stove are established.
以雄性奥利亚罗非鱼为试验材料,研究了三丁基锡(TBT)对鱼类精巢细胞凋亡的影响。
The effect of tributyltin chloride (TBT) on apoptosis of fish spermary cell was researched by using male Oreochromis aureus as experiment material.
经过试验,确定用锡浆作为芯片粘结材料。
After experiment, tin slurry is determined as the binding material of chips.
以锡冶山尾矿坝工程为例,探讨了数值法在尾矿库坝体岩土孔隙水压力消散试验中的应用,对提高试验精度、减少试验开支、指导工程安全施工具有现实意义。
With the help of numerical method it analyzes the data of pore water pressure vanishing test, which can increase the precision of the test and cut the expense of engineering investigation.
采用标准加入原子吸收分光光度法测定铅锡合金锭液中铅的浓度,试验确定了最佳的测定条件。
The lead concentration in Pb-Sn alloy plating bath was determined by standard additional atomic ab-sorption spectrometry, and the optimal determination conditions were obtained.
从糊料选择、染料筛选、地色染料染色工艺、雕印试验工艺几个方面,研究了加工锡zsd的雕印性能。
Discharging properties of ZSD is discussed from respects of selections of thickeners, dyestuffs, background dyeing process, as well as discharge printing process.
所以主耶和华如此说:看哪,我在锡安放一块石头,作为根基,是试验过的a石头,是宝贵的房角石,作为稳固的根基;
Therefore thus says The Lord Jehovah: Indeed I lay a stone in Zion as a foundation, A tested stone, A precious cornerstone as a foundation firmly established;
实验室试验表明锡、银、金的回收率分别达(%):95,92,90,同时还可回收残渣中的铅和锑。
The results of laboratory experiments have shown that the recovery of tin, silver and gold can reach 95.92 and 90% respectively;
文章通过试验证明:纯锡焊料凸块和含钴底部凸块金属焊层结合可延长无铅焊接倒装片的寿命。
In the article experiment prove:combination with feine tin-solder-bumps and underbump-metalliza with cobalt be able to longthen life of leadless flip-chip-solderng.
本文报道用铁精矿制球、链篦机-回转窑还原焙烧法从连平磁铁矿脱除锡、锌试验的结果。
This paper presents the results of studies of a method for removing tin and zinc from pellets made from Lian-ping magnetite ore containing said metals by reductive roast in a grate-kiln.
采用正交试验研究了氰化镀铜锡合金工艺中各因素水平与镀液、镀层性能的关系,优选出一种最佳工艺配方。
A cyanide tin - copper plating process was optimized by means of orthogonal test. The effect of bath components of electrolytic solutions and electrodeposits was investigated.
试验结果表明,锡、铟是银基钎料中的有益元素,其最佳含量均为5%。
The results show that Sn and In are advantageous elements in silver filler metal and the optimum content for both is up to 5 % respectively.
在碱性锡酸盐镀锡溶液中进行了镍微粒与锡的共沉积试验,对所得锡-镍复合镀层的磨擦性能进行了研究。
Experiment of co-deposition of Ni particles with Sn metal from alkaline stannate bath was performed and the friction performance of the resulting Sn-Ni composite coatings was investigated.
对多种锡铅焊料进行一系列不同条件下的漫流性试验 ,分析它们在铜表面上的铺展状况 ,最后归纳出焊料成分、钎焊温度、助焊剂对软钎焊料漫流性影响的规律。
The results show that the melting properties of the solder alloy are satisfactory, and the soldering temperature and time have much effect on the shearing-strength of the joints.
针对某选厂废弃的钨锡精选溢流进行了选矿试验研究 ,采用振动矿泥摇床与离心机组合粗选,运用重选-浮选 -磁选(水冶)联合工艺流程 ,有效地解决了钨锡细泥综合回收问题。
In accordance with some wolfram tin effuse come from cleaner in a concentrating mill, this study adopt vibrated slimes shaking table combining with centrifugal separator to put up a roughers.
介绍了控制锡须的其它一些有效措施及锡须生长加速试验。
And thereby an effective method for controlling whisker forming as well as the solutions for other difficult problems in pure tin electro...
介绍了控制锡须的其它一些有效措施及锡须生长加速试验。
And thereby an effective method for controlling whisker forming as well as the solutions for other difficult problems in pure tin electro...
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