青云翻译

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(2) at the time of construction, on concrete mix proportion of irregular, arbitrary, rule of thumb ratios action is not required by standards.

(2) when construction, is not standard to the concrete mixture ratio, the capriciousness is big, the only experience does not carry on the allocated proportion operation according to the standing operating procedure.

( 2) At the time of its construction, the concrete than are not standardized, great arbitrariness and experience alone is not a standard matching operation carried out.

(2) at the time of construction, on concrete mix proportion of irregular, arbitrary, rule of thumb ratios action is not required by standards.