所要做的只是将单元用四个螺栓固定到其支承表面上。
All that is needed is to bolt the unit to its support using four bolts.
对于不同内部介质接触的部件，如外表面、防护罩及支承凸缘等不需腐蚀余度，地脚螺栓除外。
No corrosion allowance is required for such parts not in contact with the inside fluid as the outside surface of shell, skirt, support lugs and so on, except for anchor bolts.
因而现已出版的本标准中，有允许结构螺栓支承面上有模具印痕的叙述。
The Standard was published containing the statement permitting die seams on structural bolt bearing surfaces.
因而现已出版的本标准中，有允许结构螺栓支承面上有模具印痕的叙述。
The Standard was published containing the statement permitting die seams on structural bolt bearing surfaces.
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