have tightened
-he apretado
Present perfect conjugation of tighten. There are other translations for this conjugation.

tighten

A clamp should be tightened very tight and it is advisable to tighten after you have tightened the compression system, if you use this.
Una abrazadera clamp debe ser apretada fuertemente, y se recomienda ajustarla después de ajustar el sistema de compresión, si usted usa uno de estos.
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