This paper introduces controlled blasting technology on signal chamber of pit-bottom and main haulage roadway, which are of complex condition, lithological character and highly security.
介绍了采用控制爆破技术施工位于井底车场及主要运输大巷的信集闭峒室，条件复杂，岩性变化大，要求安全性高。
The lettuces are used as main raw materials, seeking the best recipe of lettuce drink and the best condition of production technology by adopting the orthogonal design.
以莴苣为主要原料，采用正交试验方法，确定莴苣饮料的最佳配方和生产工艺的最佳条件。
It puts forward some main factors that influences the silt, which are structure characteristics of the filter bed, water quality of river, the condition of water force and the technology...
提出了滤床的结构特征、河水水质、水动力条件及取水工艺是影响淤塞的主要因素，总结了防治淤塞的建议。
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