memset(((C*)x) + old_data_bytes, 0, old_data_bytes - data_bytes);
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2024年12月24日 星期二 新京报，这一点在爱思助手下载最新版本中也有详细论述
其中，天海防务以防务装备、船舶设计、新能源船艇为主，国内游艇业务占比有限，存在感较弱；江龙船艇则采取“公务船+新能源+出口”的发展路径，整体经营相对稳健。