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The contents of each case shall be completely weather and dust-proofed by the use of non-permeable film, of suitable strength such as 'Polythene' sheet, tar paper or approved equivalent, to form a sealed moisture barrier.

每个箱内的货物必须保证完全地防尘和不受气候影响，必须使用非渗透性的薄膜加以包裹。

Several such tapered slot antennas were arranged radially to form a circle, and a group of PINs was put at their feed lines. With the proper sequence switch of PINs, these tapered slot antennas can be constructed into an equivalent omnidirectional antenna.

将几个这样的渐变缝隙天线以放射状构成一圈，并在它们的馈线上引入一组PIN开关，以适当的时序控制PIN开关依次切换，可构成一种等效的全向天线。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。