tee piece meaning in English

t管,丁字管
t形连接件
t形片
三通管

Pipe joints and elements for polypropylene pressure pipelines , types 1 and 2 ; injection moulded tee pieces for socket - welding , dimensions
1型和2型聚丙烯压力管道用管接头和零组件.承插焊接用
Pipe joints and elements for high density polyethylene pressure pipelines , types 1 and 2 ; injection moulded tee pieces for socket - welding , dimensions
1型和2型高密度聚乙烯压力管道用管子接头与零件.承插