Final answer:
California's two main exports in transpacific trade are agricultural products, such as grapes and almonds from the Central Valley, and technology products from Silicon Valley.
Step-by-step explanation:
California's two primary exports in transpacific trade have been agricultural products and technology products. The state's Central Valley is a highly productive agricultural area, known for exporting numerous foods including tomatoes, grapes, almonds, and others. Moreover, California's technological hub, Silicon Valley, near San Francisco, is a key area for high-tech research and Internet commerce, contributing significantly to exports in the form of electronics, software, and various tech services.