相反横点，锡环哪些是焊管交替16管组成，每个组成铜，铅和铁，铅。
Opposite the horizontal point, a ring of tin to which are welded tubes alternatively 16 tubes composed each composed of copper-lead and iron-lead.
相反横点，锡环哪些是焊管交替16管组成，每个组成铜，铅和铁，铅。
Opposite the horizontal point, a ring of tin to which are welded tubes alternatively 16 tubes composed each composed of copper-lead and iron-lead.
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