English to French Tech/Engineering Biology (-tech,-chem,micro-) molecular machine

context
"a molecular machine comprising a movement part and a control part. The movement part comprises several machine elements which are adapted to be moved with respect to each other. These machine parts are molecular structures, particularly nanomolecular structures. The movement part includes a first molecular element (4), a second molecular element (5) and a linking element (6)."
"the first molecular element is a platform (4) and the second molecular element is a positioning arm (5). The positioning arm is fixed to the platform via the linking element (6)."
"The first molecular element and/or the second molecular element and/or the linking element preferably are biomolecules"
"The linking element 6 comprises two DNA strands and connects the positioning arm 5 to the platform 4."
"the linking element (6) constrains all relative movement of the
first molecular element (4) and the second molecular element (5) except of a rotation of the second molecular element (5) within a plane parallel to the first molecular element (4)."
"the linking element (6) is created by two adjacent scaffold crossovers with three and four unpaired bases."