General Electric Co. said Tuesday it has agreed to acquire two European 3-D printing companies for a combined $1.4 billion, marking a strong push into new ways of making aircraft and other components.

GE GE, -7.70% will buy Sweden’s Arcam AB SE:ARCM and Germany’s SLM Solutions Group AG AM3D, -0.73% in a move that could put pressure on other aircraft components makers including Rolls-Royce Holdings PLC UK:RR RYCEY, -8.89% and United Technologies Corp. US:UTX , according to industry observers.