A.工业设备及管道的绝热工程施工,宜在工业设备及管道压力强度试验、严密性试验及防腐工程完工后进行
B.在有防腐、衬里的工业设备及管道上焊接绝热层的固定件时,焊接及焊后热处理必须在防腐、衬里和试压之前进行
C.雨雪天不宜进行室外绝热工程的施工,当在雨雪天、寒冷季节进行室外绝热工程施工时,应采取防雨雪和防冻措施
D.以上说法全部正确
1.简单说明事因;
2.表示感谢并希望有回报机会。
A.f(x,y)·h(x,y)
B.h(x,y)·f(x,y)
C.f(x,y)/h(x,y)
D.h(x,y)/f(x,y)
We have received your letter informing us of our not having settled the payment of July 2.
We fully aware that the remittance should be made before July 2according to the S/C, but our remittance arrangements with our bank have not been finalized up to now, so we ask you to accept our requesting the extension of the payment date to 20th July.
Since the contract involves considerable amount of money, we would appreciate your understanding and we sincerely apologize for any inconvenience caused by our delay in remittance.
We look forward to receiving your favorable reply.
……
A.沟头防护工程制止沟头前进的保土量
B.谷坊、淤地坝等制止沟底下切的保土量
C.塬面防护工程制止坡面扩大的保土量
D.稳定沟坡制止沟岸扩张的保土量
A.阀门应设在容易接近、便于操作、维修的地方
B.隔断设备用的阀门不宜与设备管口直接相连或靠近设备
C.经常操作的阀门,最适宜的安装高度为距离操作面1.2m上下
D.地下管道的阀门应设在管沟内或阀井内