English to Romanian Tech/Engineering Materials (Plastics, Ceramics, etc.) alpinism

Adverse effects on the life span of dynamic ropes (influence of moisture and ice):
A wet or frozen rope has significantly reduced dynamic properties and strength, especially its strength in ***knots drops***. Rubbing against rock, karabiners or other sharp edges is the most frequent way of mechanical damage to the rope. Dust penetrating into the rope structure in the presence of moisture causes slow wear of the rope. If possible, always use a packaging for the rope. Rubbing and subsequent thermal effects during rappelling and lowering may damage the rope sheath and reduce its strength and life span.