Each device family has a shell program — Extras on Crystal, and the Launcher on Quartz — that allows the user to run application programs.

每种设备系列都有一个shell程序—Crystal上的Extras和Quartz上的Launcher，它们允许用户运行应用程序。

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Of the defects detection system of the shell of crystal oscillator, obtaining high quality preprocessed image is prerequisite to correctly verify the defects.

在晶振外壳缺陷检测系统中，正确识别缺陷的前提条件是得到高质量的预处理图像。

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A machine-vision spot-inspection system for crystal oscillator shell (COS) quality detection was developed, which can monitor the punch mould state by spot-inspecting the COS automatically.

开发了一套晶振外壳抽检系统，通过对晶振外壳这种微型冲压件的缺陷检测，实现对冲压模具磨损情况的无人监控。

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Other pieces incorporate ivory, agate, shell, and rock crystal.

BBC: Entertainment & Arts

The 75 objects on display will include antique ornaments made of ivory, shell, and rock crystal along with modern jewelry made of diamonds, emeralds, sapphires, rubies and pearls became fashionable in later years.

FORBES: Boston MFA to Open New Gallery with Jewelry Exhibit