instrument prospect for oil
Prospect for Exploration
Prospect for mineral exploration
prospect for ore_finding
Anti-explosion for main condenser
approach channel for ship lock
cable guiding pipe for main tower
disease types for discharged recruit
Electrical control system for main motors
integrated hydraulic propulsion for ship
interception system for ship
Microalloy Steel for Ship Plate
nuclear power device for ship
Polyester Fibre for for spinning
Main types of Ground Objects
a high regard for Confucian classics and a low regard for commentaries