If you're looking for electronics, search for "NWT" (new with tags) or "NIB" (new in box).
如果你想买电子产品的话，搜索“NWT”(new with tags新品，带标签)或者“NIB”(new in box新品，未拆封)。
2
NWT may need to test or direct the testing of materials to determine suitability and render approval.
NWT可能经过试验或者直接检测决定是否无害。
3
Numerical simulation of nonlinear waves and a restrained ship model advancing in regular heading waves inside a 3d viscous numerical wave tank (NWT) is carried out.