In the paper four aspects have been studied:(1) tree and distributing, belonging to the correlative contents of the dendrology,(2) the macroscopical character in virtue of magnifier and entitative microscope observing the three sections (cross section, radial section and tangential section );(3) the microcosmic character, in virtue of light microscope observing slices.

本文從以下四個方面進行了研究：(1)樹木及分布国产迷系列视频在线观看应用，樹木學方面相關(guān)的內(nèi)容一级做a爱全过程视频；(2)木材宏觀特征欧美日韩亚洲，借助擴大鏡和實體顯微鏡五月丁香六月激情欧美综合不卡，在木材的三個標準切面欧美性爱电影免费观看，即橫切面、徑切面和弦切面上進行觀察久久久国产精品无码aa；(3)木材微觀特征超碰97无码在线观看，借助光學顯微鏡觀察切片黄色网站在观看18181818禁。

Suber The cork cells are seen as 14 polygons, show a honeycomblike arrangement in tangential section and resemble a brick wall in transverse and radial sections.

歐洲栓皮櫟軟木細胞為14面體，弦切面細胞呈蜂窩狀排列操精品免费，橫切面和徑切面呈磚墻狀排列婷婷五月丁香基地；細胞壁上存在褶皺。

The results were as follows the airdried density ( moisture content of wood is 12%), the basic density and the ovendry density were 0.583 g·cm-3, 0.462 g·cm-3 and 0.507 g·cm-3 respectively, the airdried density was at the medium level in domestic wood species;the shrinkage coefficient of radial, tangential and volumetric were 0.099%, 0.183% and 0.296% respectively, the maximum swelling were 4.106%, 7.958% and 12.627% respectively;the ratio of tangential shrinkages to radial shrinkages was 1.5-1.9;the toughness was 52.12 kJ·m-2;the hardness of cross, radial and tangential section were 41.53 MPa, 31.41 MPa and 35.51 MPa respectively;the compressive strength parallel to grain was 44.50 MPa ;the modulus of elasticity in static bending and the bending strength were 12.63GPa and 127.31 MPa respectively;the shearing strength parallel to grain of radial and tangential were 8.76 MPa and 10.54 MPa respectively;the cleavage strength to grain of radial and tangential were 124.3 N·mm-1 and 138.6 N·mm-1 respectively.

結(jié)果表明大葉櫟木材的氣干密度（含水率為12％）一级A片夜夜爽、基本密度和全干密度分別為0.583 g·cm-3国产黄色片av、0.462 g·cm-3和0.507 g·cm-3，氣干密度屬于國產(chǎn)木材的中等級水平四房色播综合网；徑向欧洲久久久久久、弦向和體積干縮系數(shù)分別為0.099%、0.183%黄色网站视频污污污黄色、0.296%欧美亚操逼，濕脹率依次為4.106%、7.958%和12.627%黄色香蕉一级Av，差異干縮為1.5-1.9日本体内she精2╳╳╳，其尺寸穩(wěn)定性較好；沖擊韌性為52.12 kJ·m-2igao视频官方网站，端面直接观看黄色网站视频、徑面和弦面硬度分別為41.53 MPa、31.41 MPa和35.51 MPa久久产精品一区二区三区污，順紋抗壓強度為44.50 MPa欧美作爱牲交a，抗彎彈性模量和抗彎強度分別為12.63 GPa和127.31 MPa，徑面和弦面順紋抗剪強度分別為8.76 MPa和10.54 MPa欧美在线中文字幕日韩精品，抗劈強度依次為124.3 N·mm-1和138.6 N·mm-1亚洲精品日韩手机专区第一页。

tangential magnetic component：接線磁界成分

tangential longitudinal section 切向縱斷面 | tangential magnetic component 接線磁界成分 | tangential maneuver 切向機動

bastard grain; tangential section：(木材的)切線斷面

韌皮束 bast strand | (木材的)切線斷面 bastard grain; tangential section | 野麻(野麻科;四數(shù)木科) bastard hemp; Datisca

tangential section;Bastard grain：(木材的)切線斷面

切線面切片 tangential section | (木材的)切線斷面 tangential section;Bastard grain | 切線面(細胞)壁 tangential wall