查询词典 preliminary design

In the research foundation of reconstructing leading hole into swirl hole, board hole, blocking hole and other internal energy dissipation ,this paper adopts the method of combining optimization design , experimental study and theoretical analysis together, and discusses barrage effect of level rotary internal energy dissipation discharge tunnel with shaft inlet, and obtains the preliminary achievement of testing and theoretical research.

本文在导流洞改建为旋流洞、孔板洞、洞塞洞等内消能工的研究基础上，采取优化设计、试验研究与理论分析相结合的方法，探讨了竖井进流水平旋流内消能泄洪洞的阻塞效应，取得了试验和理论研究方面的初步成果。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。