The thermal insulation body adopts the foam concrete, the straw foam concrete, the pumice concrete, the foam polyurethane or the foam phenolic resin thermal insulation material.
保温体采用泡沫混凝土、秸秆泡沫混凝土、浮石混凝土、发泡聚氨酯或者发泡酚醛树脂保温材料。
According to the invention, the roller basal body (11) is made of textile fabric or hardboard soaked by phenolic resin.
根据本发明，滚筒基体(11)由酚醛树脂浸透的织物纤维或者硬纸板形成。
According to the invention, the roller basal body (11) is made of textile fabric or hardboard soaked by phenolic resin.
根据本发明，滚筒基体(11)由酚醛树脂浸透的织物纤维或者硬纸板形成。
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