电阻箱

SB2015-4 Precision Decade DC Resistance Box is made of precise aging-processesed and low temperature coefficient coil resistors and precise seal switches.

SB2015-4型精密十进位直流电阻箱采用经过特殊老化处理、低温度系数的精密线绕电阻器及精密密封开关。

SB2015-3 Precision Decade DC Resistance Box adopts high voltage glass glaze resistors and special high voltage seal switch.Its electric performance is very stable and insulation intension is very high.The resistance value can be adjusted under the condition of ceaselessly opening voltage(Note:The using switch should not be at the point of 0.)It is easy to operate and suitable to be used to calibrate insulation resistance meter,and suitable to be used as high resistance standard.

SB2015-3型精密十进位直流电阻箱采用高压玻璃釉电阻器及独特的高压密封开关，电性能稳定可靠、绝缘强度高、可在不断开测试电压的条件下调节电阻值（正在使用的那只开关不处在"0"位置时）、操作方便，适用于检定/校准绝缘电阻表，也可作为高阻标准。

The working frequency is equal to or less than the permissible error limit of measurement frequency of the resistance box..

电阻箱的工作频率等于或低于测试频率上限时的最大允许误差。

The principle and design idea of Pt resistance digital thermometer by means of unbalanced bridge are expounded.

阐述了用非平衡电桥设计组装铂电阻数字温度计的原理、设计思想，提出了非线性项的处理方法，介绍了利用电阻箱或QJ23电桥组装数字温度计的3种方法。

This article gives overall theory analysis around the factors of producing error, and demarcates the system by using standard resistance box. The experiment proves that this design has totally reached the request booked.

论文对产生误差的因素进行了全面的理论分析，并采用标准的电阻箱对系统的结果进行了校验，实验证明本设计完全达到预定的要求。

Is specializing in the production of electronic balance, the balance plate frame, sliding rheostat, Jane resistor box, cube group, cylinder groups, hook code, such as slot code, the primary rationale, Chemistry and Biology, nature, mathematics and other teaching equipment.

是专业生产电子天平、架盘天平、滑动变阻器、简式电阻箱、立方体组，圆柱体组、钩码、槽码等各种中、小学理、化、生、自然、数学等教学仪器。

This article introduced evaluation process of measurement uncertainty.It applied RT9608 Direct Current Calibration Appliance and standard resistance to measure ZX54 resistance box.

摘 要：采用上海蓝斯汀仪表研究所生产的RT9608直流电阻校验仪和一套二等标准电阻，对ZX54型0.01级直流电阻箱×1000档第一点的测量结果的不确定度评定过程的阐述与分析，指出了影响测量结果的相关因素，并通过计算合成进行了评定。

SB2015-4 Precise Decimal DC Resistance Box adopts especial aging treatment, precise wire wound resistor of low temperature coefficient and precise airproof switch.

SB2015-4型精密十进位直流电阻箱采用经过特殊老化处理低温度系数的精密线绕电阻器及精密密封开关。

SB2015-3 Precision Decade DC Resistance Box adopts high voltage glass glaze resistors and special high voltage seal switch.Its electric performance is very stable and insulation intension is very high.The resistance value can be adjusted under the condition of ceaselessly opening voltage(Note:The using switch should not be at the point of 0.)It is easy to operate and suitable to be used to calibrate insulation resistance meter,and suitable to be used as high resistance standard.

SB2015-3型精密十进位直流电阻箱采用高压玻璃釉电阻器及独特的高压密封开关，电性能稳定可靠、绝缘强度高、可在不断开测试电压的条件下调节电阻值（正在使用的那只开关不处在&0&位置时）、操作方便，适用于检定/校准绝缘电阻表，也可作为高阻标准。

SB2014 Precise DC Low Resistance Box has its own features such as high working voltage, good abstraction of heat efficiency , stable performance and novel configuration.

该电阻箱具有工作电流大、散热效果好、性能可靠、结构新颖等优点，适用于工厂、学校和科研单位作精密大电流低阻值电阻标准。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。