同时发生
发表于 2025-3-23 13:24:48
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突变
发表于 2025-3-23 15:09:50
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Insensate
发表于 2025-3-23 18:09:48
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periodontitis
发表于 2025-3-23 22:40:01
Free-standing walls, wall’s purpose has been to divide space, control movement and to obstruct vision, thus giving privacy. In some cases walls are built to provide shelter from wind. They may also have a structural purpose in retaining earth or water at different levels.
medieval
发表于 2025-3-24 03:20:51
The use of concrete,special purposes, such as protection from radiation, shielding densities of up to 4000 kg/m. can be achieved by using metallic iron or lead aggregates. Compressive strengths vary with the densities from approximately 0.48 N/mm. up to 69 N/mm. as do the thermal conductivities, from 0.11 to 2.6 W/m degC.
手榴弹
发表于 2025-3-24 09:24:02
The use of concrete,special purposes, such as protection from radiation, shielding densities of up to 4000 kg/m. can be achieved by using metallic iron or lead aggregates. Compressive strengths vary with the densities from approximately 0.48 N/mm. up to 69 N/mm. as do the thermal conductivities, from 0.11 to 2.6 W/m degC.
马笼头
发表于 2025-3-24 11:51:19
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inquisitive
发表于 2025-3-24 18:37:31
The use of prefabricated light cladding and walling materials,Precast concrete panels and cladding have already been discussed in some detail. They are not, however, excluded from this section, in which some of the problems arising from the increased use of prefabricated components are considered.
表示问
发表于 2025-3-24 20:55:37
The use of prefabricated light cladding and walling materials,Precast concrete panels and cladding have already been discussed in some detail. They are not, however, excluded from this section, in which some of the problems arising from the increased use of prefabricated components are considered.
旋转一周
发表于 2025-3-25 00:50:05
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