4.2.2 The door and frame assembly is to be as unobtrusive as possible to minimise the negative impact on product visibility, whilst being strong enough so as be suitably rigid in operation.的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

4.2.2门和框架组件是要尽可能不引人注目的要足够强大，以便有适当的操作刚性的同时，最大限度地减少对产品的知名度的负面影响。