bulb sprinkler head是什么意思

用法例句

Progress in Study on Crack Resistence of Bulky Nanoglass Prepared by Sol-gel Method;

溶胶-凝胶法制备纳米块状玻璃的防开裂研究进展

Experiment research on glass changing from insulator to conductor;

玻璃由绝缘体变成导体的实验探究

Study on Cleaning Agent for Glass with Low Freezing Point;

低冰点高效汽车挡风玻璃清洁剂

Syntheses and Properties of Green Long Lasting Luminescent Glasses;

绿色长余辉发光玻璃的合成和性质

Formation and absorbtion spectrum of Sm rare earth borosilicate glasses;

含Sm稀土硼硅酸盐玻璃的形成区及吸收谱线

Light amplification of rare earth doped glasses;

掺稀土离子玻璃的光放大效应