stannum tetrachloride was an excellent catalyst for synthesizing dibutyl maleate and had higher catalytic activity than other catalysts.
四氯化锡是合成顺丁烯二酸二丁酯的良好催化剂,具有较高的催化活性。
the mass thickness and surface homogeneity of the stannum attenuation foil can meet the request of soft x ray laser experiment.
质量厚度和表面均匀性的测试结果均符合软x光激光实验的要求。
in recent years, some new methods about removing of stannum from tungsten are put forward.
近年来,我国除锡方法的研究发展很快,出现了一些新的方法和技术。
the concentration of stannum in sample solution could be determine by gfaas.
光度法可确定样品溶液中锡的浓度。
in city of level of countrywide all ground, took the lead in achieving this one goal without stannum .
在全国所有地级市中,无锡率先实现了这一目标。
in the paper, the leadless pom composites were developed with powder of stannum instead of lead.
本项研究采用无毒的锡粉代替铅粉研制出新型的无铅pom复合材料。
a method is described to determine the stannum in catalyst by atomic absorption spectrometry, and sample is dissolved by microwave.
研究了采用微波消解样品, 火焰原子吸收法测定催化剂中锡含量的方法。
the copper alloy material contains copper, zinc, stannum and manganese.
铜合金材料中含有铜、锌、锡和锰。
this method has high sensitivity, accuracy, precision and lower limits of detection, can satisfy the requirement of determination of arsenic and stannum simultaneously with less time and effort.
pure stannum mill「 comes from malaysia, and is established in china.」
纯锡坊”源自马来西亚,立足于中国。
by means of the method of self-calibration, the deviation of the zero and slope of the output of stannum cell, owing to the change of environmental temperature , can be compensated.