气孔

The reason of gas-hole defects occured in steel casting for molding eroduction line was analyzed.

结合多年的实践,分析了湿型砂水平造型线上铸钢件气孔的原因,介绍了预防铸钢件气孔的措施。

Stomatal, dispersed shrinkage, shrinkage cavity, sonim and slag inclusion belong to this kind of defect.

属于这种类型的缺陷有气孔、缩松、缩孔、夹砂、夹渣等。

There were some spiracle connected each other among the cover, column layer and the cone layer.

表层、柱状层和锥体层之间的气孔相互连通。

It is incorrect that only stoma density and stomatic chamber size are used as xerophilous indexes.

单纯地把气孔度、气室大小作为抗旱指标是不正确的。

The distribution of stomatal apparatus and ceraceous ornamentation of the white squama-shaped leaf of Chamaecyparis pisfera spach were special.

日本花柏白色鳞形叶的气孔分布和蜡质纹饰都有一定的特殊性。

Abstract： Using Improved serape-making method,the studies were made on the stomatal density of flag leaves of rice.

摘 要： 用改良刮制法研究了水稻剑叶的气孔度。

Porosity can be caused by gases coming out of solution during cooling and becoming trapped between dentrite arms as tiny voids.

在冷却过程中，溶液中的气体逸出造成多孔性，或被截留在晶体枝杈之间形成微小气孔。

Antitranspirant A chemical that reduces transpiration. Antitranspirants may work by depositing a waterproof film over the stomata or by inducing stomatal closure.

可以减少蒸腾作用的化学物质。抗蒸腾剂可以通过沉积气孔上的防水膜或诱导气孔关闭起作用。

The microporosity morphology and formation mechanism of cast magnesium alloy was investigated with software for analysis percentage of microporosity and field scanning electron microscopy.

铸造镁合金微孔的组织形态形成机理符合气体形成模型和溶质再分配理论,从而验证氢气析出形成显微气孔机理。

Air hole, burnthrough, cooapse and welding crackle occurred in the fixed overhead weld for aluminium and aluminium alloy tubes, above all the small-size thin wall tube.

及合金管,特别是小口径薄壁管固定口仰焊部位易出现气孔、烧穿、塌陷及焊接热裂纹等问题,分析问题存在的原因,从焊接工艺方面入手,提出一套消除气孔及烧穿的操作手法。

The silica-phellem block and stomate tubercle on 3rd leaf are underdeveloped, the tubercle of stomate block is small and dense in japonica, big and sparse in O.

发现了三叶期第三叶片的硅化-木栓细胞带和气孔器乳突发育不完全的现象。

The effects of double coating on the pores of lime titania type stainless steel electrode are studied with high speed cinecamera, oscillograph, optical microscope, SEM with EDS, etc.

采用平板堆焊、高速摄影、波形分析、光学金相、扫描电镜能谱分析等测试方法，研究了双层药皮钛钙型不锈钢焊条气孔的影响。

The pattern of fracture by impact penetration test and tensile fatigue test of thermite welding with stereoscan was observed,and the component of defect with energy spectrum was analyed.

微观缺陷主要包括微孔和夹杂,其中微孔由微气孔和微缩孔组成,夹杂物按形态和尺寸分为团簇状夹杂、锥状夹杂、粒状夹杂、积聚物夹杂、丝状夹杂和混合形夹杂。

A large amount of research results showed that plants show isohydric behavior when the plant hydraulic and chemical signals cooperate to promote the stomatal regulation of leaf water potential.

当植物水力信号和化学信号共同作用促进气孔叶水势的调节时，植物叶水势的调节表现为等水行为。

This refers to the use of a miniature BTE hearing aid that is coupled to an ear insert or earmold (vented or unvented) via a tubing of approximately 0.8 mm inner diameter.

就是微型耳背式助听器用一根内径大约0.8毫米的细导管耦合到耳塞或者耳模（耳模可以开或者不开通气孔）的验配方式。