| 摘要 |
FIELD: transport.SUBSTANCE: invention discloses pipe length (11, 12) including isolation layer (1) of mineral wool containing additives or auxiliary substances. Note here that isolation layer has lengthwise slit (3) and lengthwise cut-out (4) made at its inner surface. Outer surface of pipe length isolation layer (1) has at least one lengthwise cut-out (5, 6) extending a bit inside isolation later (1).EFFECT: higher efficiency of transfer.4 cl, 3 dwg |
