Material : The tarpaulin must be solid, non-crackable during typical handlings
材料：在正常搬运过程中防油水布必须坚固，不会破裂
Yuncheng is a typical non - excellent district of tourism.
运城市是一个典型的旅游非优区。
The speech signal is a kind of typical non-stationary signal.
语音信号是一种典型的非平稳信号。
The speech signal is a kind of typical non-stationary signal.
语音信号是一种典型的非平稳信号。
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