Histological findings of the skin include flat dermal-epidermal junction thinned dermis with compactly arranged collagen fibers and hypoplastic appendage structures.
The flat body sides are aligned with the canted tails, the wing-body junction is clean, and there is a sharp chine line around the forward fuselage.
扁平的机身侧部与倾斜的垂尾处于同一面上，翼身衔接处光滑，前机身被一清晰的脊线环绕。
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The paper introduces the constructing requirement of frame flat-beam junction, retailed drawing of reinforcing bars, advantages and disadvantages in engineering application and other issues concerned.