细胞的内切向壁及径向壁均加厚，而外切向壁保持薄壁状态。
The inner tangental wall and radial wall are thickened, while outer tangental wall remain in thin wall state.
研究表明，在钻杆管端加厚过程中所形成的内加厚过渡带的形状对钻杆的使用寿命有显著影响。
Research shows that fatigue life of drill pipe was influenced by the geometric shape in intermediate belt formed during the end upsetting process.
有时在坏死菌丝内可发现新的子菌丝，但子菌丝细胞壁不规则加厚、细胞质坏死、也呈不正常状态，并可再度形成新的菌丝。
However, the daughter hyphae also showed abnormal alterations such as irregular thickenings of the cell walls, necrosis of the cytoplasm and formation of new daughter hyphae.
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