When advancing and uncovering coal in roadway, better construction method is vibration shot, metal framework, borehole bleed-off and hydraulic hole, of which vibration shot is principal.
井巷掘进揭煤时，较好的施工方法是震动放炮，金属骨架，钻孔排放和水力冲孔，尤以震动放炮为主。
Up to 20 percent of the top airflow should bleed off down the sidewalls.
高达20%的顶部气流应由侧壁向下流动。
Product notes: We are developing a double block and bleed design seating arrangement for applications which require verifiable positive shut off.
产品说明：我们正在开发双重阻塞和排放结构的阀座排列设计，用于要求能够证明确实关断的应用环境。
At the end of the shift or work day, close the cylinder valve and bleed the pressure off the regulator and torch equipment.
在下班或工作日结束的时候，关闭钢瓶阀门，放出调整器和吹管设备内的压力。
At the end of the shift or work day, close the cylinder valve and bleed the pressure off the regulator and torch equipment.
在下班或工作日结束的时候，关闭钢瓶阀门，放出调整器和吹管设备内的压力。
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