macroplankton

For whole steel plate with nozzle of a large scale tank, a special postweld heat treatment oven will be required to satisfy operating sequence.

大型储罐带接管壁板的现场整体焊后热处理 ,需要在施工现场建造出特型的热处理炉来满足工序要求 ,本文介绍这项热处理工艺的设计及功率推算过程 ,具体给出了测温热电偶和电加热片的分布方

The preforging's influence research on large Aluminium alloy shell;

预压对大型铝合金壳锻件成形的影响

Structure analysing of large skip;

大型提煤箕斗的结构分析

Technical and economic problems in large-scaled fixed-roof oil tank,;

固定顶油罐大型化的技术经济问题

Design of large-scale display wall system;

大型拼接显示系统的设计方法

Acute toxicity tests of four new pesticides were conducted in the lab with Scenedesmus obliquus,Daphnia magna and Brachydanio rerio as subject to evaluate the safety of pesticides in the aquatic ecosystem.

以斜生栅列藻 (Scenedesmusobliquus)、大型 (Daphniamagna)和斑马鱼 (Brachydaniorerio)为试验生物 ,在实验室条件下测定了吡虫清、吡嗪酮、恶草酮和精喹禾灵 4种新农药对水生生物的急性毒性IC50值或LC50 值 ,并进行了安全性评价。