Subject: sectional surface и attacking point tech. Пожалуйста, помогите перевести две фразы: sectional surface и attacking pointВыражение встречается в следующем контексте: To avoid wedging of the telescoping parts of the elevation jig it is preferred that hydraulic, pneumatic or mechanical lifting devices, e. g. jacks or hydraulic pistons, have an attacking point running along the internal symmetrical axis of the pipes 2 (or having an attacking point in the centre or the polygon being formed by the sectional surface of the pipes 2 in the event where the pipes do not have a symmetrical sectional surface |
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