作用于防水防尘的壳体，主要用于防止盒内物体，例如：线路、仪表、仪器等进水而影响其性能。
为了使运输的货物不被弄潮湿，它有防水盒防空气的的优点。
For carrying goods liable to be spoiled by damp or water they have the advantage of being both water-tight and air-tight.
这种耐久的高强度塑料盒在100英尺水深以内是防水的。
The durable high-impact plastic case is water resistant to 100 feet.
记得带上一把好雨伞，一盒塑料袋，或许带一些防水布(有些是专门用于摄影的)，和一条用来擦拭设备的毛巾。
Carry a good umbrella, a box of plastic bags, perhaps a small tarp (some are specially made for photography), and a towel with which to dab your equipment.
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