| 摘要 |
A method and apparatus for testing a container for puncture resistance using a structure having a means to guide a dropper as the dropper freefalls and impacts with a pressurized container or a pressurized container freefalls and impacts with an impact target. An improved method of manufacturing a steel sheet having an isotropic metallurgical microstructure, the steel sheet being used to form a pressurized container with increased puncture resistance, wherein the improvement comprises heat treatment also is disclosed.
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