The convector pits are covered with convrete grids that are prefabricated for building pigsties.
供热器并被通常用在猪圈
的混凝土格栅覆盖。
筑物、船等)预制构件的, 立;
板;The convector pits are covered with convrete grids that are prefabricated for building pigsties.
供热器并被通常用在猪圈的混凝土格栅覆盖。
Model testing study is made on prefabricated spiral V-notch blasting, and hydromatic method is used to simulate the quasi-static process in blasting of explosive.
因此，研究螺旋切槽裂纹的扩展
及与螺旋角等的关系，具有重要意义。
声明：
句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
