压风自救装置装置厂家哪家好，还是山东中煤产品质量可靠。
Rescue equipment on coal, coal product quality assurance, reasonable price. Welcome calls.
本自救器具的专利是一项新装置，它就像一个人造的蜘蛛丝囊一样，能在我们身处楼房火灾中的时候救我们的命。
This patent on self-rescue instrument is a new device, it's just like a man-made spider's silk-bag and it can save our lives when we are in a storied-building fire.
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