A threaded neck ring is secured to the tapered end of the cylinder to allow a protective cylinder cap to be installed.
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。
2
A threaded neck ring is attached to the tapered end so that a protective cylindercap can be installed.
锥状顶端装有带螺纹的颈环，可以安装保护性的钢瓶帽。
3
The Tiny Titan Series is a small bore, square endcapcylinder line that is designed to excel in applications where space limitations are of the utmost importance.