A threaded neck ring is attached to the tapered end so that a protective cylinder cap 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。
A cooling circuit for a neck ring of a preform is conformed to the surface of the neck ring by providing a neck ring in two parts.
本发明提供一种用于一预成型件的一颈环的冷却回路，其通过以两部分提供一颈环来与所述颈环的表面相配。
A cooling circuit for a neck ring of a preform is conformed to the surface of the neck ring by providing a neck ring in two parts.
本发明提供一种用于一预成型件的一颈环的冷却回路，其通过以两部分提供一颈环来与所述颈环的表面相配。
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