Waterbirds, for example, can choke on plastic bottle rings and get cut by scrap metal.
2
车有螺纹的颈环固定在钢瓶的锥形端，可以安装保护性瓶帽。
A threaded neck ring is secured to the tapered end of the cylinder to allow a protective cylinder cap to be installed.
3
用弹性理论分析方法，得到了环向纤维增强钢压力容器(压缩天然气气瓶)在内压作用下的应力。
Based on the elastic stress analysis, the stresses of the hoop fiber reinforced steel pressure vessels (compressed natural gas bottle) under internal pressure are obtained.
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