Principle and technology of sterile measurement on the plantlets in vitro Principle and technology of on machine measurement for large gears Principle and technology of mango preservation and processing Principle and technology of low temperature plasma diagnosis Principle and technology of protein crystal structure determination Principle and technology of software defined radio Principle and technology of thin film transistors Principle and technology of water-saving cultivation under bed planting systems Principle and technology of infrared countermeasure Principle and technology of plant quarantine