问题:缆风绳是桅杆式起重机的(),直接关系到起重机能否安全工作,也影响着桅杆的()。...
Sunday, September 24, 2023
Saturday, April 29, 2023
问题:聚笨乙烯热固性泡沫塑料:持久的保温,隔热性能,独特的抗震缓冲性能,抗老化性能,()是发展前景最好的保温材料之一。...
Wednesday, September 13, 2023
问题:()是电极位比较低的金属,可以起到牺牲阳极的作用来防止金属腐蚀。...
Sunday, September 24, 2023
Tuesday, May 23, 2023
Thursday, September 14, 2023
问题:非种植季节进行树木栽植时,应根据不同情况采取技术措施?...
Monday, February 12, 2024
Tuesday, January 9, 2024
问题:仪表管道的压力试验应采用()为试验介质,当采用水为介质时,应使用(),对于(),气动管道或设计压力小于0.6MPA的仪表管道,宜采用气压试验,介质为空气或氮气。...
Tuesday, January 30, 2024
Monday, October 23, 2023
Thursday, September 15, 2022
Sunday, September 11, 2022
问题:高压喷射注浆法的施工参数应根据土质条件.加固要求根据()确定,并在施工中严格加以控制。A、设汁B、工程经验C、试验D、B或C...
Wednesday, April 10, 2024
Monday, October 23, 2023
Sunday, September 11, 2022
问题:气动信号管道安装无法避免中间接头时,应采用()接头连接,气动信号...
Thursday, September 15, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
Wednesday, April 10, 2024