main stay meaning in English

【造船】大桅主索；中坚，台柱；靠山，主要的生活来源 (Agriculture is the mainstay of a country. 农为国本)。

This paper investigates the enterprise ' s resources of longkung group , analyzes in detail its external environment and internal conditions , finds its external opportunity and threat and its internal advantage and disadvantage , combines the enterprise ' s strategic target and determines the development strategy of longkuang group as follows : adhere to the principle of taking the coal industry as the main stay , developing the diversified economy and developing in an all round way , make the coal industry stronger and bigger and bring along the non - coal industry , expand and upgrade the non - coal industry , actively participate the market competition , gradually substitute for coal industry and build a large , strong and competitive enterprise group with the coastal characteristics
本文通过深入调查龙矿集团企业资源，详细分析其外部环境和内部条件，找出面临的外部机会与威胁以及内部优势和劣势，结合企业经营战略目标，确定了龙矿集团的发展战略：坚持以煤为本，多业并举，全面发展的方针；煤炭主业做强做大，带动非煤产业的发展；非煤产业经营上规模、上档次，积极参与市场竞争，逐步实现对煤炭产业的替代。构建具有海滨特色和强大竞争力的大型企业集团。