What is the primary advantage of low and medium pressure pneumatic lifting bags over high pressure bags?

The primary advantage of low and medium pressure pneumatic lifting bags is that they offer a greater lifting range, which allows for more versatility and safer lifting in various rescue scenarios. Low and medium pressure bags can effectively lift heavier loads or provide additional height with a more gradual application of force, which can be essential in situations involving delicate extrications. This characteristic helps to stabilize the load and reduces the risk of secondary collapses or further injury to victims trapped in vehicles or debris.

While the other options may have their own merits in different contexts, they do not define the primary advantage of low and medium pressure lifting bags. The focus on lifting range highlights their ability to operate effectively in demanding rescue situations, where precise control and adaptable lifting capabilities are critical for rescuers to operate safely and efficiently.