有关焊接位置? For SMAW and manual GTAW the welding position " vertical-down " is not permitted. 手工焊及手工氩弧焊时不得采用“垂直 -向 下”的焊接位置。 I'm not sure what's VERTICAL-DOWN ? [ ]查看更多4个回答 . 2人已关注
如何翻译Another factor that can affect both motor an ...? Another factor that can affect both motor and total efficiency is motor loading. The peak efficiency of a typical three phase motor occurs at about 75 – 80% of its rated load but it will maintain a fairly flat efficiency curve between 60% and 100% when operating at rated speed. When loading drops below 60%, efficiency begins to drop and around 40% it will drop rapidly. This is not an issue in a typical, constant speed pump application as long as the HP required at minimum flow is, at least, 60% of rated motor HP. 查看更多3个回答 . 5人已关注