首 页
大学试题
CMS专题
工学
经济学
专升本
法学
教育学
历史学
更多分类
搜索
题库考试答案搜索网 > 题目详情
当前位置:
首页
>
如何理解铸件的缩孔和缩松?
>
题目详情
问题题干
答案解析
相关问题
热门问题
最新问题
问题详情
如何理解铸件的缩孔和缩松?
时间:2023-02-02 14:58
关键词:
机械工程材料
材料科学
大学试题
理学
答案解析
<p> 缩孔是指几种在铸件上部或最后凝固部位、容积较大的孔洞,缩孔多成倒圆锥形,内表面粗糙;缩送是指分散在铸件某些区域内的细小缩孔。</p>
相关问题
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
合金的()和()是形成铸件缩孔和缩松的基本原因。
简述缩孔和缩松的防止措施。
最新问题
什么叫ORS?如何配制?如何使用?
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo,without the authorization or privity of the Shipowner or his agent,is().
(), or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.
A salvor may be()the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.
The () is used for hauling in or letting out the wires or ropes.
Vessels must be()valid certificate of nationality or certificated of registry or license.
逻辑运算符(AND、NOT、OR)的运算顺序是AND→OR→NOT。
别人在看