In the absence of force when the fuel block can be automatically extinguished, absolute safety.
在没有上升力的时候燃料块会自动熄灭，绝对安全。
Exclusive metal thermo-block with double thermostatic control and safety thermo-fuse.
独家金属热块双恒温控制和安全热保险丝。
The line block valves are of vital importance for the safety operation of the pipeline.
线路截断阀是管道安全运行的重要保证。
The line block valves are of vital importance for the safety operation of the pipeline.
线路截断阀是管道安全运行的重要保证。
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