Due to their slanted position and the air cushion in between the ribs are optimally adjusted to the acoustic behaviour of the poloplast above ground drainage systems polo-kal ng and polo-kal3s.
由于这些肋条是倾斜状态，中间还有气垫，使其能优化调节poloplast的polo-kalng和polo-kal3s系列地上排水系统的声学特性。
Due to their slanted position and the air cushion in between the ribs are optimally adjusted to the acoustic behaviour of the poloplast above ground drainage systems polo-kal ng and polo-kal3s.
由于这些肋条是倾斜状态，中间还有气垫，使其能优化调节poloplast的polo-kalng和polo-kal3s系列地上排水系统的声学特性。
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