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| паз для шпонки; шпонкова канавка (гніздо); жолоб у стінці стовбура свердловини | |||
| шпночна канавка | |||
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| жолоби на стінках стовбура свердловини | |||
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key seat : 2 phrases in 1 subject |
| Oil and gas | 2 |
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