The abundance index of the five type green space in tree layer was community park (6.3) >general park (4.5) >town park (4.3) >special park (3.9) >coiled park (3.8).
在这五种类型的公园绿地中，乔木层的物种丰富度表现为社区公园（6.3）>综合性公园（4.5）>街旁绿地（4.3）>专类公园（3.9）>带状公园（3.8）；
The plate type coiled pipe or spiral pipe is molded by two flat plates with corresponding grooves or a convex and a concave plates which are oppositely pressed.
板式盘管或螺旋管是由两片有对应凹槽的平板或凸、凹板对压成型的。
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