纸包不住火,高压空气更难让橡胶长期包住,橡胶会老化开裂,高压气体无缝不钻,就算你有气
泵在边上加气也有个限度。
纸包不住火,高压空气更难让橡胶长期包住,橡胶会老化开裂,高压气体无缝不钻,就算你有气
泵在边上加气也有个限度。
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