1)sell at half price,半价出售2)selling at half price,半价出售3)half pay,半价4)semivalence,半价5)half-price,半价6)half price,半价7)half value layer,半价层8)half rate message,半价电报9)half-priced ticket,半价票10)half value lyer,半价层
用法和例句
Effective energy of X-ray is generally caiculated by use of half value layer and absorpting coefficient of the absorbing material.