The proper optical fiber,plane directional optical grating and concave reflector were chosen and integrated together based on the theoretical computation for the optical layout of the spectrometer.

設(shè)計(jì)一種微型可見光CCD攝像光譜儀的光學(xué)結(jié)構(gòu)，通過理論計(jì)算欧美色吊，選用合適的光纖国产超黄色视频、平面定向光柵和凹面反射鏡，并將它們合理組合男女无遮掩激情免费视频，采用聚焦反射和分光的方法四川美女大白屁股黄毛片观看，將待測(cè)光進(jìn)行色散，直接投射到CCD接收器件的表面欧美性爱特级黄。

Commissure face of seed plane, rarely slightly concave.

果表面密被長(zhǎng)柔毛色综合视频久久。

Utricles convex abaxially, plane or slightly concave adaxially; rostra 1/8-1/5 length of kernel; seed adherent to pericarp; leaves and bracts acute but not acicular at apex.

胞果凸背面，正面的平面或者稍凹777av视频；喙1/8-1/5段珠心人人摸人人交；種子附著于果皮；葉和苞片銳尖但不是針狀的在先端在线免费观看视频黄片。 16 Corispermum 蟲實(shí)屬

The system consists of a multi-reflection spherical cavity and is suitable for different kinds of specimen,such as concave mirrors,convex mirrors and plane mirrors.

通過積分球和補(bǔ)償電路131美女作爱视频一区二区，大大地降低了對(duì)機(jī)械部件的加工要求和激光強(qiáng)度不穩(wěn)給測(cè)量帶來的影響。

The local heat transfer coefficients on the concace, convex and plane wall of a duct have a mild difference, with the heat transfer coefficent of concave surface being the largest and that of the convex surface the lowerest.

同一通道中凸欧美一级αA、凹表面的局部換熱系數(shù)有一定程度的差別伊人久久久AⅤ老熟妇。凸面的換熱優(yōu)于平面，后者又大于凹面超碰在线色婷婷。

Two flat lateral zones 12, parallel to the plane of symmetry X, each of which located near one end of the concave central area 11

兩個(gè)平的橫向區(qū)域12se亚洲国产综合在线，平行于對(duì)稱面X，各個(gè)橫向區(qū)域12位于靠近凹入中心區(qū)域11一端的地方

Point P'' is the intersection point of the concave area 11 with the cross-sectional plane of symmetry Y parallel to the reference axes y and z.

點(diǎn)P欧美69囗交视频，為凹入?yún)^(qū)域11與平行于參考軸y和z的橫截對(duì)稱面Y的交點(diǎn)免费看视频一级片日本中文字幕。

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Experimental TEA CO2 laser with printed circuit board preionization is used. The laser has gain length of 90 cm. The resonator is composed of a total-reflective concave spherical mirror of curvature radius 20 m and a total-reflective plane mirror of mirror radius 4.5 mm, separated by 5 m distance.

實(shí)驗(yàn)中TEA CO2激光器采用印刷電路板預(yù)電離結(jié)構(gòu)，增益長(zhǎng)度90 cm美女网页黄a，腔長(zhǎng)5 m久久这里只有精品26，球面全反射鏡曲率半徑20 m，輸出端平面鏡半徑4.5 mm国产精品视频熟女一区二区，得到了內(nèi)環(huán)半徑為4.5 mm被操免费视频观看网址、外環(huán)半徑為5.5 mm的基模環(huán)形光斑輸出。

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