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The spectroscopic analysis carried on Ni-based alloy visible spectrum with grating spectroscope and prism spectroscope and color spectrum had been taken, characteristic of visible spectrum was studied in Ni-based alloy.

摘要使用光栅看谱镜和棱镜看谱镜对镍基合金可见光谱进行看谱分析，摄制彩色图谱，研究基体元素镍和各成分元素的可见光谱特征。

248Nm zero-order nulled chirped silica phase masks are fabricated by insertion a cylindrical lens to 325nm He-Cd laser holographic system to form the chirped grating patterns on photoresist and then transfer the patterns to silica substrates by reactive ion etching.

采用在325nm He-Cd激光双光路全息干涉系统的一臂上插入柱面镜的方法和反应离子刻蚀技术研制了周期渐变的零级抑制石英相位掩模版，并用该掩模版在B/Ge双掺光纤上研制出中心波长1551nm，带宽11.4nm，反射率约60％的宽带Chirp光纤光栅。

As specified for floor grating, with cast aluminum abrasive nosings.

特别指定，地板栅栏楼梯每一级的金属护沿要采用打磨处理的铸铝。

Floor grating at stair heads shall be provided with cast aluminum abrasive nosings.

楼梯顶口的地板栅栏应该配有经打磨处理的铸铝金属保护沿。

The aluminum abrasive nosings shall be installed such that the top of the nosing is flush with the top of the grating.

在栅栏顶部与金属保护沿齐平地方应该安装打磨的铝制金属保护沿。

In this paper, two important optical devices, phase grating, phase zone plate are also proposed and designed for the first time.

首次提出并设计了位相型光栅、位相型波带片等重要的光学器件。

With the zinc-coated steel grating,the tank level is fine-looking,portable

罐面采用镀锌钢格板，具有美观、轻便、耐腐蚀等特点

Two improved schemes, redistribution of the outputs and adding a Dammann grating to release the burden of the element, are brought forward to overcome the zero grade spectrum.

针对器件使用中出现的零级谱问题，提出了重新分布输出面滤波图象和增加Dammann光栅减轻器件负担两种改进方案。

Ion beam etching ; Grating ; surface relief ; Quasi directional effect

离子束蚀刻；光栅；表面浮雕结构；准单向蚀刻效应

Wire Mesh Grating a mother is not easy.

做一个母亲是不

We will see more and more activist government policies that distinguish economic activities according to the nationality of the actors.

我们将看到越来越多激进的政府政策，这些政策根据企业的国籍来区分经济活动。

If we can prove the independence of an axiomatic system, then we can guarantee the conciseness of this system, ie.

如果能够证明某个一阶谓词系统的独立性，那么就能够保证该系统的建立是精炼的，即没有任何一条公理或推理规则是多余的。