发布时间:2025-02-05 16:59:31
一般法兰根据管道的材质、直径、温度和压力来选取的,压力或温度改变,法兰的外形尺寸就随之变化。
比如DN150的管道,你需要知道管道的材质、运行的压力和温度,根据这三点参数就可以选择法兰了。和法兰相配套的螺栓和垫片也和这几点参数有关。
预应力高强度混凝土管桩施工方法有哪些 phc管桩施工规范要求
2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31你好我家的卧室的吸顶灯也是方形的灯泡坏了想换灯泡怎么把它拆卸下来啊是整体都拆下来吗
2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31 2025-02-05 16:59:31