特种合金换热器, 防垢, 耐腐超厚.Heat exchanger made from special alloy, Scale prevention , Anti - corrosion , Ultra thickness.说明了利用声化学除垢、防垢的可行性.The result indicates that the prevention and removal of incrustation is feasible by sound ...
Just crank up your hearing aid a peg or two.把助听器调高一两个刻度就可以。His hand took his hat from the peg over his initialled heavy overcoat, and his lost property office secondhand waterproof.他伸手从挂钩上取下帽子。那下面挂的是绣着姓名首字的沉甸甸的大衣和从失物招领处买...