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由于生产工艺和几何断面之异,石棉水泥大、中波瓦的横向抗折力较高,纵向抗折力较低,而石棉水泥小波瓦(以下简称小波瓦)则相反,其横向抗折力(以下简称横抗)较低,纵向抗折力(以下简称纵抗)较高。“JC66—77”部颁标准规定小波瓦纵抗不低于70公斤,各厂实际达100～140公斤,有的高达150公斤以上;小波瓦横抗不低于170公斤,各厂只有170～200公斤,许多厂在170公斤左右。
Due to differences in production process and geometric sections, asbestos-cement large and medium-wave bricks have higher transverse fracture resistance and lower vertical fracture resistance, while asbestos-cement wavelets (hereinafter abbreviated as wavelet tiles) have the opposite effect and their transverse bending resistance. (Hereinafter referred to as transverse resistance) is low, and longitudinal bending resistance (hereinafter referred to as longitudinal resistance) is high. The “JC66-77” ministry standard stipulates that the wavelet wave longitudinal resistance is not less than 70 kilograms, each factory actually reaches 100-140 kilograms, and some are as high as 150 kilograms or more; the wavelet-watt resistance is not less than 170 kilograms, and each factory has only 170- 200 kilograms, many factories are about 170 kilograms.