高电平倍增器

high fidelity stereo micro earphone

high-altitude operation car【车辆】;overhead working truck【车辆】

put into high gear; go full steam ahead

ultrahard high speed steel end mill

high forceps dilivery

glazy pig iron【材】;high silicon pig iron【材】;silvery pig iron【材】

vertical high pressure steam boiler

high intensity cathode-ray tube