Diameter-class

基本解釋

In order to forecast accurately height of each diameter class of poplar in Jiangsu Province,the quadric parabola function with five parameters was established.
用江囌省楊樹(shù)解析木編制了楊樹(shù)標(biāo)準(zhǔn)樹(shù)高曲線(xiàn)模型,該模型引入了適宜的林分控制因子(樹(shù)齡和地位指數(shù)),是具有統(tǒng)計(jì)學(xué)意義的樹(shù)高曲線(xiàn)模型。
Study on Estimation of Stand Diameter Class Volume and Merchant Volume
林分逕堦蓄積量與材種出材量測(cè)算的研究
This lens can magnify 20 diameter.
這個(gè)透鏡能放大20倍。
Kindly send us two samples of each class quote for.
報(bào)價(jià)時(shí)，請(qǐng)對(duì)每一個(gè)等級(jí)的各寄兩個(gè)樣品。
The diameter of the tree-trunk is about 2 meters.
這樹(shù)乾的直逕大約是2米。