Stand as shown (see Fig. 2) with the cylinder valve between you and the regulator.
站得象演示得那样（见图2），使钢瓶阀门在你和调整器之间。
Use a pressure reducing regulator or separate control valve to safely discharge gas from cylinder.
使用减压调整器或单个的控制阀来安全地从钢瓶中排出气体。采用止回阀，防止回流入钢瓶。
Use a pressure reducing regulator or separate control valve to safely discharge gas from cylinder.
使用减压调整器或单个的控制阀来安全地从钢瓶中排出气体。采用止回阀，防止回流入钢瓶。
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