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对尖齿 [duì jiān chǐ]
[脊椎] zygodont
- 用光学显微镜对葡萄叶片齿尖上表皮气孔的形态、发育、结构进行了观察。
Morphology and development of adaxial stomata on tooth tips of grape leaves were observed with light microscope and scanning electron microscope. - 针对该区煤心采取率低的情况，对绳索取心金刚石钻头进了了改进：一改钻头形状为三环尖齿底唇形状；
Aimed at low recovery of coal core in the area, wire-line coring diamond bits used here are improved. Firstly the shape of bits is improved to triple circular spiky toothed and bottom labium shaped;
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