Pengaruh diameter tip elektroda dan posisi pengelasan chain straight dan zig-zag terhadap kekuatan produk struktur ringan longitudinal square honeycomb corrugated core sandwich panels pada pengelasan Micro Resistance Spot Welding (mRSW) = Effect of electrode tip diameter and chain straight and zig-zag welding pattern on strength of lightweight structure product longitudinal square honeycomb corrugated core sandwich panels with Micro Resistance Spot Welding (mRSW)