Therefore the general construction process scheme is worked out as follows: opentrench drainage, work site dried in the sun, conventional butt welding, and pipe laid down into trench.
经过调研和反复现场勘察，确定的总体施工方案为：挖明沟排水，作业带晾晒，正常组对焊接，沉管下沟。
2
A new process method, using open annulus distributed holes in place of ring trench as the lateral oxidation Windows, is reported to fabricate vertical-cavity surface emitting laser (VCSEL).