And the high-pressured active bend use high density steel manufacture after the heat treatment, can guarantee the fixed work intensity of pressure like this, extension service life.
高压活性弯头使用高密度钢制造并且经过热处理，这样能够确保额定的工作压强，延长使用寿命。
High-density high-intensity carbon materials were prepared through specific process with coke and spherical graphite as raw materials and CJF-43 and FB as additive.
以超细焦炭粉和球形石墨为原料，以CJF-43和FB为粘结剂，通过特定工艺制备高密度高强度炭素材料。
Weight ratio of the density of high-volume, higher ambient temperature range of tolerance and are able to withstand the vibration of high intensity.
体积重量比密度高，更高的耐受环境温度范围，并且能经受高强度的振动。
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