What tensions the pendant on a textile system?

The correct choice is two tirfor winches, as this option effectively describes a method for tensioning a pendant in a textile system. Tirfor winches, which are mechanical devices designed for lifting and pulling, can be used in pairs to create balanced tension on a pendant. This allows for precise control over the tension applied, ensuring stability and consistency in the textile system's operation.

Using two tirfor winches enables an even distribution of force, which is essential in applications where accurate tensioning is critical, such as in suspension systems or when dealing with fabrics under varying loads. This method is particularly beneficial in environments where load adjustment may be necessary, as it provides a flexible solution to achieve the desired tension without the risk of imbalance that could arise from using a single winch.

Regarding other options, a single winch system might not provide adequate control over the tension unless additional mechanisms are employed. Counterweights could theoretically provide tension, but they don't offer the same level of precision and adjustability as two tirfor winches. Pneumatic compressors are unrelated to tensioning systems and focus primarily on providing compressed air, rather than directly influencing the mechanical tensioning of textiles. Thus, using two tirfor winches is the most appropriate solution for tensioning the pendant