DAO
* DAO | In cable conduit, blocs, in special pipes, in case of increased the demands for protection against water encroachment.
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DAC
* DAC | In soils of all groups in case of building in trench, groups 1-3 in case of building by the íîæåâûì cable-layer.
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DAU
* DAU | In soils of all groups in case of building in trench, groups 1-3 in case of building by the íîæåâûì cable-layer.
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DP2
* DP2 | In soils of all groups, in areas with active manifestations of permafrost deformations.
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DPL
* DPL | In cable conduit, blocs, pipes at danger of damage by rodents, on bridges and trestle-works.
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DPM
* DPM | In soils of all groups in case of building in trench, groups 1-3 in case of building by the íîæåâûì cable-layer.
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DPO
* DPO | In cable conduit, blocs, in special pipes.
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DPC
* DPC | In soils of all groups in case of building in trench, groups 1-3 in case of building by the íîæåâûì cable-layer.
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DPT
* DPT | For hanger on tangent towers, contact railroad network, on supports of communication lines.
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OA2
* OA2 | In soils of all groups in areas with active manifestations of permafrost deformations.
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OAC
* OAC | In soils of all groups in case of building in trench, groups 1-3 in case of building by the íîæåâûì cable-layer.
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OPC
* OPC | In soils of all groups in case of building in trench, groups 1-3 in case of building by the íîæåâûì cable-layer.
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