Stem, by special treatment to ensure that the best fixed, and can automatically correct location.

阀杆经特别处理以确保最佳固定，并能自动校正位置。

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The sensor is fixedly attached to the bicycle brake at a location to detect rotational behaviour of a bicycle wheel by sensing the magnet mounted to the air valve stem.

传感器在某一位置处固定连接于自行车制动器上以便通过检测安装于气阀杆上的磁铁来检测自行车车轮的旋转行为。

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Objective To investigate the location and proliferation of human hair follicle stem cells.

目的探讨人毛囊干细胞定位和增殖特性。

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Immediately after a bone marrow harvest, a volunteer courier travels -- by plane, train, or automobile -- with the stem cells and personally delivers them directly to the patient's location.

CNN: Why I donated my bone marrow