"剑杆式投纬织机" can be translated into English as "rapier loom" or more specifically, "rapier-type weft insertion loom".
"Rapier loom" is a commonly used term in the textile industry to refer to a type of loom that uses a rapier (a long, thin, and flexible rod or tape) to insert the weft yarn into the warp shed.
"Rapier-type weft insertion loom" provides a more detailed description, emphasizing the weft insertion mechanism.