This paper introduce the application of Siemens digital direct current timing device (6ra70) and program logical controller (SIMATIC S7-300) in piling bed electromagnet for the first time.
该文介绍了西门子全数字直流调速装置(6ra70)和可编程逻辑控制器(SIMATICS7- 300)首次在码垛电磁铁系统中的应用。
Instead of just piling the oysters up close to the riverbed, as had been done in the past, they built reefs of various heights above the bed for them to grow on.
他们没有按照过去通常的作法仅仅将牡蛎在靠近河岸处一层一层地摞起来，而是在河床上建造了高度各异的(供牡蛎生长的)牡蛎礁。
Cofferdams are made by driving metal sheet piling into the Bed to form a watertight fence.
在近代工程中，筑围堰时一般先打下钢板桩以形成阻水层。
Cofferdams are made by driving metal sheet piling into the Bed to form a watertight fence.
在近代工程中，筑围堰时一般先打下钢板桩以形成阻水层。
应用推荐