摘要: 本实用新型公开了一种便于拆卸的泥鳅养殖防鸟网,包括尼龙网片,尼龙网片的一端连接有卷套,卷套连接有转轴,转轴的一端连接有旋转手柄;尼龙网片的另一端连接有固定杆,所述固定杆的两端分别连接有拉网装置.本实用新型便于更换尼龙网片,同时便于尼龙网片的收网和拉网,便于尼龙网片的拆卸和更换,提高工作效率....
Just two years later, in August 2005, GE Energy announced that first firing of one of the gas turbines had taken place, marking the first time that a 9FB machine had been fired for a commercial project. 年份: 2005 收藏 引用 批量引用 报错 分享 ...
旅游纪念品的消费水平对于地区旅游业的收入与发展有着至关重要的作用.河北省有着丰富的人文和自然资源,而旅游纪念品的开发却相对落后.本文针对旅游纪念品市场存在的品种单一,缺乏地方特色和时代特征等几个重要问题,选择了"吴桥杂技"这一河北文化符号进行了产品的转化与设计实践,对设计理念与方法进行了思考与阐述.关键...
The invention relates to previously known surgical instruments which are provided with a gas delivery device (10) for supplying a rare gas or similar inert gas to a tissue treatment area and a device (20) for rinsing a target zone, especially the tissue treatment area. The aim of the invent...
This article studies a well‐known, and flawed, use of the Black–Scholes model in reporting. It achieves two principal goals. First, it reports our critical analysis into the topic resulting from the combination of our fields' expertise in it. Second, we report our study into an as‐yet ...