求翻译：a．落煤管总重量约175t（包括用于封堵钢梁的钢板、耐磨合金堆焊重量，具体重量以施工图为准）。其中复合耐磨合金衬板共约40t。（请投标方自己核算，投标文件写明）是什么意思？

a. The coal chute total weight of about 175t (for plugging steel beams, steel plate, wear-resistant alloy surfacing weight, specific weight construction drawings date). Alloy liner Composite Wear of approximately 40t. (Please bidders own accounting, stated in the tender documents)

A. drop tube and total weight of 175 T (including steel beams used to block the plate, and the solder alloy wear weight, specific weight in order to project. These composite wear alloy backing a total of about 40 t. (please bid parties, their own accounting Tender Documents)

a． Total weight is about 175t coal dropping pipe (including those for sealing weight of steel beams with steel, wear-resistant alloy surfacing, specific weight of the construction drawing shall prevail). Composite wear-resistant alloy liner about 40t. (Please offer their own accounts, tender documen