94生活常识网有道词典

hearing-aid tube

H 开头单词

基本解释

  • 助听器用电子管

英汉例句

    双语例句

  • Others have pointed out that it could be a vacuum-tube hearing aid, which was first sold in 1921.
    其他人指出那可能是个真空管的助听器，助听器最早在1921年销售。