semi-bordered pit pair

The results show that it is the aporate timber;ray is homeotype;growth ring sharp transforms from springwood to late wood,the zone of later wood is narrow;the size of tracheid molecule of springwood and late wood are different;bordered pit single row;the crossfield pit belongs to cryptomeripsoides;xylem ray single row.

朝鲜崖柏为柏科植物,应用光学显微镜和扫描电子显微镜对其茎次生木质部进行解剖学研究,发现其为无孔材;射线为同型;生长轮中早材至晚材急变,晚材带较窄,早晚材管胞分子大小差异极大;具缘纹孔单列;交叉场纹孔为杉木型;木射线单列。

The structure of the bordered pit membrane on the fir tracheid was studied through the observation using scanning electron microscope.

对于针叶材管胞的具缘纹孔膜构造,植物解剖学家们进行了很多研究,发现不同树种的纹孔结构、形态有很大不同,可将其作为科属特征,并对其进行了详细分类(Tsoumis,1965;周等,1990)。

In order to better understand the structure of the bordered pit membrane and Micropores on margo of Cunninghamia lanceolata.

为了弄清楚针叶材的具缘纹孔膜及其塞缘孔隙构造,本研究利用扫描电子显微镜对不同含水率杉木材(生材和气干材)及经过脱木素处理后的气干材管胞具缘纹孔膜进行了观察,获得了高质量的扫描电镜照片,对不同杉木材(生材和气干材)及经过脱木素处理后的气干材管胞具缘纹孔膜进行了系统的比较,研究表明: 1、生材杉木管胞具缘纹孔的纹孔塞没有特殊增厚,纹孔塞明显,纹孔塞至塞缘的厚度变化不明显或略明显。

Study on the Structure of Bordered Pit Membrane and Micropores on Margo of Cunninghamia Lancelata Tracheid;

杉木管胞具缘纹孔膜及其塞缘微孔构造

paralled orientation. The vestures and warts in intervascular pit chamber separately ware fourd in 5 and 19 species.

维管间具缘纹孔室内有5种具附物，19种具瘤状物。

a simple machine of the inclined-plane type consisting of a spirally threaded cylindrical rod that engages with a similarly threaded hole.

具有螺旋形线状汽缸棒的啮合相似的螺纹孔的斜面型简单机械。

The Analytic Research on the Problem of a Circular Hole with Several Periodic Cracks about Fracture Mechanics;

断裂力学中具有多条裂纹的圆形孔口问题的解析研究

Black of the card

盲孔(纹板上无孔的部分)

"The pin gauges are used to measure the whole distance, the pitch diameter of the thread, etc. Especially, they are suitable for curved groove width measurement."

针规适用于机械加工中孔径、孔距、内螺纹小径的测量,特别适于弯曲槽宽及模具尺寸的测量。

Research on Crack Detection of Porcelain Insulators Based on Image Edge Detection;

基于边缘检测的绝缘子裂纹诊断研究

A small hand tool having a spiraled shank, a screw tip, and a cross handle and used for boring holes.

手钻一种小的手工工具，有螺旋尖头，带槽纹的钻身，横装的手柄，作钻孔用

One that grates, as an implement with sharp-edged slits and perforations on which to grate foods.

磨碎机用来摩擦的东西，如一种带有边缘锋利的切口和孔用来磨碎食物的器具

porous block type arrester

多孔绝缘体型避雷器

live-line (insulated) piercing connector

火线(绝缘)刺孔连接器

quadrant-edge orifice plate

1/4圆周边缘孔板

Plastic injection mould, coolant passages, eject pin and electrical heating holes.

塑胶射出模具–却水孔、梢孔及电热孔.

Any of numerous hand tools for boring holes.

钻孔工具，手钻钻孔用的手持工具

profile and thread rolling die

滚轧型材与螺纹模具

TOOL REQUIREMENT FOR M8x25 Thread

M8×25螺纹需要的工具

tical thread tool microscope

光学螺纹工具显微镜

freshly painted lawn furniture.

新画上细麻纹的家具。