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内容:该系统的主要部件包括:一个作为平台的
水泥
板及锚、一个展开易弯面用的框架、多个浮板+尼龙绳+转轮+棘轮+轴向柱塞泵的单元、一套液压管路+蓄能器+油缸+发电机。,5、 可以离岸到深海作业:因为
水泥
基板底座悬吊于水中,这样就摆脱了对陆地的依赖。
新发现,关于日化真假电容的鉴别。
アストレア
14年5个月前
回复于
极客DIY
内容:一般可以通过掂重量,但是奸商会掺沥青甚至沙石
水泥
等……只有拆开才真相大白。
化学实验安全注意事项
zhaokenb
13年8个月前
回复于
化学
内容:的沸水94.进行燃烧等实验时,切勿在木质或其他可燃材质的地板、地面上进行(包括铺地纸),否则容易造成火灾,此类实验可以在家中瓷砖或人造岩、岩石、玻璃桌面进行,若无烟的燃烧可在楼道中进行,楼道地面一般为
水泥
切管方法+硝糖出环
海绵宝宝
9年2个月前
发表于
喷气推进
内容:以上发动机,机长十厘米,硝糖八十克,白
水泥
固定,喷口管口1厘米比3厘米,木有 推力数据,下次继续努力加油!
问大家一个关于喷口的问题
kc276644985
9年4个月前
回复于
喷气推进
内容:引用 吴景春:不知道啊,看见视频上好像是类似于小石子一类的猫砂,话说前辈可知内径17MM的发动机装上
水泥
喷口能飞起来吗?
自己做的ZVS电路,工作起来感觉还可以
friedel
11年2个月前
发表于
高电压技术
内容:正面图,前面是四个
水泥
电阻,阻值和功率都标在壳体上(有意用了额定功率高得多的
水泥
电阻,反正也不是很贵),右下那个快速二极管是修改电路布线时废弃的,懒得拆掉。
介绍一个耐高温的无机粘合剂
带火星的木条
14年6个月前
发表于
化学
内容:有兴趣的童鞋可以尝试氧化铝版本,1000度时可以长期运行还有固化后不像
水泥
,硬而脆,而是具有一定韧性,可以很好保证气密性,耐撞击。
新手初次做特斯拉线圈(正在进行中。。)各位请多指教
北落师门
15年4个月前
回复于
高电压技术
内容:如果电压没虚标的话,说明高压中不能简单地认为峰值电压是标称的1.414倍,更何况电网的电压可能有波动,当然,不排除电容质量的问题另:我说的击穿是指你木板支架,你不是说木板烧焦了吗,我第一次的变压器放在
水泥
地上
Re:Re:回 14楼(乖老汉) 的帖子
bkh123
13年3个月前
回复于
极客DIY
内容:比如业余条件下可以用电钻当车床,削一块木头,或者就用你的聚苯头锥,然后活点泥或
水泥
,往里一插完事。
時代の風 :icom IC-751A的收发电路分析(多图)
极速外卖
6年2个月前
发表于
电子技术
无线电
拆机鉴赏
内容:串接在电源上的0.012欧姆
水泥
电阻用以监测功率放大器整体电流,热敏电阻为末级功放作偏置补偿。
嘿嘿。。3D打印的24mmRNX发动机系列模具完工!
口贝
9年6个月前
回复于
喷气推进
内容:顺便把我另外的想法也共享吧,现在也没时间去试验了;使用高铝
水泥
稍微混合水分,过一定目数的筛子后放在模具里加压,固话后就行,但苦于没找到很好的模具和好的批量的生产方法小批量测试就结束了。
液体发动机低压燃料装机测试
leeqingyang
13年2个月前
发表于
喷气推进
内容:催化药柱采用二氧化锰、硅土、
水泥
结构。
路牙石搬运机
amo
10年4个月前
回复于
极客DIY
内容:愣猪 发表于 2014-9-12 21:23 这个不用夹持,,也不用洞,,扣住
水泥
块的底下就行了,,跟人抬东西一样人搬也很累……想起了以前卖化肥的时候,装货卸货,三轮车都开到化肥堆边上了,只需搬起一袋化肥
烂尾将近一年的刀刀终于有进展了
北落师门
13年3个月前
发表于
机械与工具
内容:这是修整用的磨刀石,很轻的,买磨刀石的时候老板送的,说是白刚玉,但是很松,像是
水泥
的质感。
Re:回 14楼(乖老汉) 的帖子
乖老汉
13年3个月前
回复于
极客DIY
内容:比如业余条件下可以用电钻当车床,削一块木头,或者就用你的聚苯头锥,然后活点泥或
水泥
,往里一插完事。
关于火箭燃烧室.燃料与喷嘴
wgsmogui
18年7个月前
回复于
喷气推进
内容:就“民兵”这样的用途,可以考虑用粉质无机材料加上水玻璃固结,或者用
水泥
做喷管。
回 24楼(jxs) 的帖子
rudolf
12年6个月前
回复于
高电压技术
内容:这个TC最大的好处就是对地线的接地要求不严格,只要仍在
水泥
地上就有电弧,不过短一些,地线接一个金属罐子再放地上电弧就正常了。
“鸿鹄”系列探空火箭研发制造
CIT
1年9个月前
发表于
喷气推进
科创基金
内容:箭体使用3D打印制作,推进仓初步建模如下发动机部分我使用C2max型knsb燃料发动机,材质ppr铝塑管,外经33内径23,长度可调整(耐压完全没问题)喷口和堵头使用环氧树脂、
水泥
粉、铁粉混合制成,再打几个螺丝固定
关于火箭燃烧室.燃料与喷嘴
虎哥
18年7个月前
回复于
喷气推进
内容:就“民兵”这样的用途,可以考虑用粉质无机材料加上水玻璃固结,或者用
水泥
做喷管。
长度达到2.5米的模型火箭
hamdad
17年5个月前
回复于
喷气推进
内容:大约1986年中秋节(或者国庆节)晚上,差不多本地区所有的职工和家属都在灯光球场(简易的体育场,大约可以容纳2000人,
水泥
的阶梯看台,多年前早已经拆除改造成网球场了)观看烟火表演(单位免费派发的门票)
新加了视频——完成LH4-B研制+推力实测!!
FROZEN巨擘
9年9个月前
回复于
喷气推进
内容:关于喷管烧蚀的问题,因为收敛段和喉衬(金属),扩张段(耐火
水泥
)是完全不同材料,存在界面粘接强度的问题,还有最高推力附近,经计算排气速度应该超过4倍音速(最高推力未知),能凑合着用,不错了,当然也在改进中
模型火箭标准化2-喷口
zzlzhang
15年10个月前
发表于
喷气推进
内容:SHOW下很久很久以前我的喷口固定 很高难度的打钉...非常稳...但是太麻烦 PVC缩口制作的 成品 喷口其实固定强度不需要很大...缩口,螺丝固定都行,KNDX的烧蚀如果是陶瓷,几乎烧蚀不了,
水泥
马赫环一次看个爽【7楼更新,多视频】
ehco
13年1个月前
发表于
喷气推进
内容:[/flash]液氧乙醇火箭发动机试车[flash=640,480]XXXXXXXXXXXXXXXXXXXXXXX/XXXXXXXXXp/sid/XMzM0MzY5NzIw/v.swf[/flash]
水泥
喷管
灵异事件求解
任某人
13年0个月前
发表于
高电压技术
内容:地面是
水泥
地。
回 20楼(terrych) 的帖子
玄明
11年8个月前
回复于
极客DIY
内容:@terrych:现代建筑大量采用了钢筋
水泥
结构,这样结构的房子被地震摧毁后,其中的梁柱结构无法像传统砖石结构房屋碎得那么彻底(如楼顶照片5)。
沼气池使用过程中的常见故障诊断与排除
大仙
16年5个月前
发表于
电气电工
内容:外处理办法是:修补好破损处;进料前将池顶洗净擦干,刷纯
水泥
浆2~3遍;凡大出料以后,要及时进料,以防池子干裂并保持池内外压力平衡。,小故障是指壳体与粉刷层基本完好,但由于气箱或池墙部分有少量砂眼和毛细孔造成慢性漏气、渗水;或是沼液中的有机酸和碎硫化氢等对气箱内壁
水泥
浆发生腐蚀;或活动盖封闭不严;或导气管松动等,通过小修即可恢复。 ,
水泥
及混凝土等建材标号不够;混凝土和砂浆级配不合要求,砂石含杂质多。 ,还要观察池壁是否有渗水现象,对于不明显的渗水部位,可在其表面均匀地撒上一层干
水泥
,如出现湿点或湿线,即为漏水小孔或漏水缝。 ,2.4沼气池的修补一般漏气毛病比较好处理,如导气管松动,则用
水泥
沙浆加固护座,内加密封;拱顶轻微漏气则用较浓的
水泥
浆排刷三次;池壁翘壳,则铲除重新仔细粉刷;活动盖松动,重新封闭。
关于量产型小型固体火箭的制作—燃料篇
liaonan
2年8个月前
发表于
喷气推进
动手实践: 实验报导,严肃内容: 教程/课程
内容:),把喷口嵌入燃料下部空缺处,周围用502密封喷口底部糊上薄薄一层蜡,或制作喷口时事先封上薄薄一层,让燃料装配好后与外界隔绝,便于保存在外圈纸上抹上白胶,旋转插入至喷口与管口齐平然后配环氧树脂,再加入
水泥
,(有条件可以用氧化铝)直至粘稠状浇筑,放至温暖的地方固化至不会流动(大约24h)接着把发动机翻面并配置环氧树脂,这一次加
水泥
,但确保流动性良好,差不多如视频所示灌树脂前一定要确保喷口摆正,否则喷出的火焰会歪
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