紙包不住火,高壓空氣更難讓橡膠長期包住,橡膠會老化開裂,高壓氣體無縫不鑽,就算你有氣
泵在邊上加氣也有個限度。
紙包不住火,高壓空氣更難讓橡膠長期包住,橡膠會老化開裂,高壓氣體無縫不鑽,就算你有氣
泵在邊上加氣也有個限度。
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