第二、第三掌背动脉
Second or third dorsal metacarpal artery
第二保持系
Second maintainer of male sterile lines
附保护第三人作用的契约
contrast with the collateral third Party
华能上海石洞口第二电厂
hua neng shanghai shidongkou power plant
ESD保护二极管
electrostatic discharge ESD protection diode
保护二次回路
Protection secondary circuit
窗口二分法
dimidiate window algorithm
河口保护区
Estuarine conservation areas
进口保护应用问题探讨
Research on application of imported relays
井口保护架
protection frame for wellhead
炉口保护框
fire hole protection ring