Because of the weight of the 10 cm Kanone 17 it was moved in two loads. The gun barrel was transported seperately with the Rohrkarren für 10 cm K 17 - barrel cart for 10 cm K 17 - (Af. 7). (Image from Bildermappe eingeführte Waffen und Geräte)
The Rohrkarren für 10 cm K 17 (Af. 7) was moved with the Protze für 10 cm Kanone 17. The image illustrates the empty barrel cart on the gun after the barrel was delivered. (Image from technical manual)