The convector pits are covered with convrete grids that are prefabricated for building pigsties.
供热器并被通常用在猪圈上
混凝土格栅覆盖。
, 捏, 虚构;
, 立;;;
数
;;
;The convector pits are covered with convrete grids that are prefabricated for building pigsties.
供热器并被通常用在猪圈上混凝土格栅覆盖。
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