通过在底板中有计划安置的且相对比率的开口，提供改善的空气通路和流通路径，同时降低了收缩和沟道的影响。

Improved air ducts and flow paths are provided, while the effects of shrinkage and channeling are reduced, through a strategically placed and relative percentage of openings through the floor.

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结果：治疗前后L esp, L ES松弛率，蠕动性收缩所占比率均有显著差异。

Results There were significant deviation in LESP, LES relaxation rate and the percentage of peristaltic contractions after therapy.

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