The safety concentration of ammonia nitrogen on the zoea larvae, mysis larvae and postlarvae was 0.295mg/L, 0.724mg/L, 1.072 mg/L respectively, and that of sulfurated hydrogen was 0.0430mg/L, 0.0553mg/L, 0.0705mg/L.

氨氮和硫化氫對(duì)日本對(duì)蝦蚤狀幼體欧美乱伦视频二区、糠蝦幼體和仔蝦的安全濃度分別為：0.295国产最新福利，0.0430超碰在在线；0.724，0.0553在线观看国产更新AV；1.072，0.0705mg/L特黄非常黄视频网站一区二区三区。

The components of the catalyst are sulfurated more completely with a longer reaction time. But the catalyst congregates into a large volume ball with a low BET surface area after a certain reaction. So the best range of reaction time is from 60 to 90 minutes.

研究發(fā)現(xiàn)欧美一A片网站，雖然硫化時(shí)間的延長(zhǎng)可提高催化劑中金屬組分的硫化物含量，但超過一定反應(yīng)時(shí)間可導(dǎo)致硫化物過度結(jié)晶聚集亚洲欧洲自拍另类校园，顆粒度增大欧美视频专区一二在线观看，比表面下降，較佳的反應(yīng)時(shí)間為60～90 min一级A片又黄又刺激免费视频。

This paper studied the effect of ammonia nitrogen and sulfurated hydrogen on the larvae of penaeus japonicus.

本文主要研究了氨氮和硫化氫對(duì)日本對(duì)蝦幼體的毒性作用三级片网站日日爱66。

Its short points are: the crosslinked tape exists a smallamount of air gap between voluble layers though being sulfurated under pressure and high temperature; the semi-conductive crosslinked tape so made can not avoid pollutive dust; besides, this craft of winding tape molding has strict requirements on the joint preparation conditions, temperature and whether

其缺點(diǎn)是：一層層纏繞包覆的交聯(lián)帶雖然經(jīng)過加壓高溫硫化，其層與層之間必然存有少量氣體間隙www.凹凸视频.com；制備的半硫化交聯(lián)帶無法避免帶有污染塵埃黄网视频；電纜接頭&包帶模塑法&工藝技術(shù)對(duì)接頭制作環(huán)境、溫度先锋资源综合、氣候要求苛刻免费在线观看人成视频。