1)  PHEMT
PHEMT晶体管
2)  pH
pH
1.
In Situ Measurement of Chloride Concentration and pH Distribution in the Crevice during the Crevice Corrosion of Copper Electronic Board;
铜电路板缝腐蚀过程缝隙中pH、Cl-浓度分布的测量
2.
ISO10390:2005 Soil Quality-Determination of pH;
ISO10390:2005土壤质量pH的测定
3.
Productions Analyses and pH Dynamics During Rice Straw Degradation by the Lignocellulose Degradation Bacteria System WSC-6;
木质纤维素分解菌复合系WSC-6分解稻秆过程中的产物及pH动态
3)  soil pH
pH
1.
Soil pHs in the tea gardens in Jiangsu, Zhejiang, and Anhui provinces and changes of soil pH in the past decade;
苏、浙、皖茶区茶园土壤pH状况及近十年来的变化
4)  Lead(Ⅱ)
Ph(Ⅱ)
5)  pH value
pH
1.
The investigation and significance by examining pH value and smear of dejecta for intestinal flora maladjustment;
粪便pH和涂片检查肠道菌群失调的研究及意义
2.
Effects of Temperature and pH value on the growth of Laribacter hongkongensis GRA1 strain;
温度和pH对香港海鸥型菌GRA1株生长的影响
3.
Influence of feedwater conductivity and pH value in RO systems;
反渗透系统给水电导率与pH的系统影响
6)  pH value
pH值
1.
Influence of pH value on rheological performance of high-density drilling fluid;
pH值对高密度钻井液流变性能的影响
2.
Effects of pH Value on Electroless Ni-P Plating on Magnesium Alloys;
pH值对镁合金化学镀Ni-P合金的影响
3.
Fast detection and control of pH value during fabric manufacturing;
生产中织物pH值快速测定与控制方法
参考词条
补充资料:晶体管-晶体管逻辑电路
晶体管-晶体管逻辑电路
transistor-transistor logic
    集成电路输入级和输出级全采用晶体管组成的单元门电路。简称TTL电路。它是将二极管-晶体管逻辑电路(DTL)中的二极管,改为使用多发射极晶体管而构成。TTL电路于1962年研制成功,基本门电路的结构和元件参数,经历了3次大的改进。同DTL电路相比,TTL电路速度显著提高,功耗大为降低。仅第一代TTL电路产品,就使开关速度比DTL电路提高5~10倍。采用肖特基二极管的第三代TTL电路,开关时间可缩短到3~5纳秒。绝大部分双极型集成电路,都是TTL电路产品。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。