In a medium bowl, combine lemon juice, sugar, and a pinch of salt. Add the julienned carrots, mix well, and refrigerate for 15 minutes.

Slice cucumbers into thin strips, sprinkle with salt, and let sit for 3-5 minutes, then squeeze out excess moisture.

Beat eggs with a pinch of salt. Heat a non-stick skillet, add oil, pour in eggs, cook until set, roll, and slice into strips.

In the same skillet, add oil and warm sausages and crab meat over medium heat for 4-5 minutes.

In a large bowl, combine warm rice, salt, sugar, pepper, and sesame oil. Mix gently.

Lay seaweed shiny side down on a bamboo mat. Spread rice, then arrange fillings in a line, roll tightly, and slice into pieces.