Saturday, September 17, 2022
Thursday, September 22, 2022
常用的钢卷尺规格有2m和5m两种,较长的有20m和()的钢卷尺,通常称为盘尺。...
Thursday, September 22, 2022
根据《本地通信线路工程设计规范》,配线电缆可视工程具体情况采用街坊配线、沿街配线或室内配线方式。有条件的地方应纳入城市的...
Friday, September 16, 2022
Wednesday, September 14, 2022
给水管道不宜穿过建筑物的伸缩缝、沉降缝,当管道必须穿过时需采取必要的技术措施,如()。...
Friday, September 16, 2022
Thursday, September 22, 2022
Tuesday, September 20, 2022
Thursday, September 15, 2022
Saturday, September 17, 2022
当液体运动时,各质点的迹线形状很复杂,互相交错,流体质点互相混杂的运动状态叫()。...
Thursday, September 22, 2022
为了使工件获得较好的强度,塑性和韧性等方面的综合力学性能,要进行()热处理。...
Thursday, September 22, 2022
Thursday, September 22, 2022
塑料管、板焊接时一般要坡口,当采用单面焊时坡口形式为()...
Thursday, September 22, 2022
单向116阀在强度试验中,压力应从()引入,在严密性试验时,压力应从()引入。...
Thursday, September 22, 2022
Saturday, September 17, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
高压管道安装时,不得用强拉,强推、强扭、修改垫片()等方法。...
Saturday, September 17, 2022