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
>
铸件产生缩松、缩孔的根本原因（）。
>
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
铸件产生缩松、缩孔的根本原因（）。
A、固态收缩
B、液体收缩
C、凝固收缩
D、液体收缩和凝固收缩
时间：2023-02-02 14:58
关键词：
铸造工艺学
机械工程
大学试题
工学
答案解析
D
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。
Masters are（）solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
最新问题
系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire，（）the claimant proves that the fire arose from fault or neglect on the part of the carrier，his servants or agents.
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.
为了防止缩孔缩松和铸造应力的产生，可分别采取什么工艺措施？
别人在看
题库考试答案搜索网 > 题目详情
题库考试答案搜索网 > 题目详情