Array
(
[0] => Array
(
[id] => 2
[name] => 首页
[category_id] => 221
[url] =>
[active] => 1
[position] => 1
[blank] =>
[is_out] =>
)
[1] => Array
(
[id] => 4
[name] => 氿上商城
[category_id] => 221
[url] => goods
[active] => 1
[position] => 2
[blank] =>
[is_out] =>
)
[2] => Array
(
[id] => 1
[name] => 学习园地
[category_id] => 221
[url] => news
[active] => 1
[position] => 5
[blank] =>
[is_out] =>
)
[3] => Array
(
[id] => 16
[name] => 氿上知道
[category_id] => 221
[url] => question
[active] => 1
[position] => 4
[blank] =>
[is_out] =>
)
[4] => Array
(
[id] => 5
[name] => 供求信息
[category_id] => 221
[url] => trade
[active] => 1
[position] => 3
[blank] =>
[is_out] =>
)
[5] => Array
(
[id] => 3
[name] => 软件下载
[category_id] => 221
[url] => jsyjj/list/409
[active] => 1
[position] => 6
[blank] =>
[is_out] =>
)
[6] => Array
(
[id] => 46
[name] => 氿上云管理
[category_id] => 221
[url] => yun/index
[active] => 1
[position] => 7
[blank] =>
[is_out] =>
)
[7] => Array
(
[id] => 22
[name] => 氿上花园
[category_id] => 221
[url] => garden
[active] => 1
[position] => 999
[blank] =>
[is_out] =>
)
)
请问管道施工中添加回阀会对设备造成什么影响？ - 工程施工 - 项目管理 - 氿上知道
返回顶部
满意答案
1）增加造价
2）增大环路阻力、增加运行费用
3）占用空间
但是为了保护主要的设备水泵、风机等在突然断电的情况下的安全，还是的设置的
wangjili
回答于：2014-01-15
共2条回答