发布时间:2025-02-03 07:09:24
不等边角钢100×63×10,理论重量12.142kg/m;
9m长,重量=12.142×9=109.278kg
植物观音莲的养殖方法和注意事项 植物观音莲的养殖方法和注意事项是什么
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