一些单位配备有68型19管130毫米多管火箭发射器。
Some units were fitted with the Type 68 19-tube 130mm multiple rocket launcher.
而国内对多管片装配式地下通道结构应用技术的研究尚为空缺，还没有装配式钢筋混凝土管型通道的设计规范可供设计职员参考。
Whereas the domestic research on the application technology of segmental prefabricated underground culvert is still blank and there is no design specification to offer for the reference.
而国内对多管片装配式地下通道结构应用技术的研究尚为空缺，还没有装配式钢筋混凝土管型通道的设计规范可供设计职员参考。
Whereas the domestic research on the application technology of segmental prefabricated underground culvert is still blank and there is no design specification to offer for the reference.
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