block diameter

• 粒径

block diameter的用法和样例：

例句

1. The nominal diameter has little significance in sediment transportation.
   等容粒径在沉沙输移中意义不大。
2. The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.
   利用显微摄像技术及算术统计平均的方法表征柴油乳化液水滴粒径。