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Fig. 1. Experimental set-up of the monitored forced silking process. The
immobilized spider (a) is placed upside down, and the tip of fibre (b) is
fixed with a magnet (c) to the load cell (d). The tip of a micropipette
perforating the plastic bag (e) is used as the gas inlet. The silking process
proceeds by displacing the crosshead of the testing machine at constant
speed.