| http://www.w3.org/ns/prov#value | - According to another embodiment, relating particularly to the case where still higher energies would have to be withstood, of about 400 to 500 t/m for example, there can be provided, not tubes fixed to the upper part of deck 1 but tubes hinged thereto and combined with hydraulic, pneumatic or stacked rubber cushion shock-absorbing means.
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